(Note: Obtain that speed which is relevant for damaging the thief s car). The magnitude of the displacement of the particle is zero, because the particle has returned to its initial position. He was very sharp in business matters and therefore became very rich in a very short span of time. I asked her if she had ever seen any one who looked like the Stone Face. No more deep blue skies or crimson and amber tints. Answer: (a) Suppose a particle goes from point A to B along a straight path and returns to A along the same path. Since the melting away of his gold, it had been generally believed that there was no like¬ness between the ruined merchant and the majestic face upon the mountain. Distance to be covered = 50 m = 0.05 km 0.05 km The people living in that valley believed that some day a great and noble person with the likeness of that face would come. 6. Answer: x1 (t) = 200 + 15t – 5t2 Give the equations for the linear and curved parts of the plot. He gets on his feet and they end up in a relationship before she finds out he is the man who killed her husband years ago. – 5t2 + 15t+ 200 = 0 On simplification, t = 8 s Answer: The people of the valley believed that the Stone Face was auspicious for them. In this manner he grew up to be a mild and quiet youth. (c) As turning of ball is not smooth, thus the distance covered by ball is not large in the reasonable time. In which interval is the average speed greatest? Answer: (a) A lives closer to school than B, because B has to cover higher distances [OP < OQ], Narrate the story that his mother told him. While drawing the x-t graph, the scales chosen are as under: Answer: Greater in 3, least in 2; v > 0 in 1 and 2, v < 0 in interval 3. The sign of v and a in the three intervals are: The graph (c) is not correct since it shows that the particle has negative speed at a certain instant. Answer:  When either the lift is at rest or the lift is moving either vertically upward or downward with a constant speed, we can apply three simple kinetnatic motion equations presuming a = ± g (as the case may be).In present case u = 49 ms-1 (upward) a = g = 9.8 ms-2 (downward) For an observe a stationary platform outside, what is the You would not like to tell the tired man on his return home that his average speed was zero!] His interest grew in the Great Stone Face which smiled on him. The Great Stone Face stood near where Ernest and his mother lived. Consider a ball thrown up. On a long horizontally moving belt (Fig. stationary observer = (9 – 4) km h-1 = 5 km h-1 (c) Choose the x = 0 m and t = 0 s to be the location and time of the ball at its highest point, vertically downward direction to be the positive direction of x-axis, and give the signs of position, velocity and acceleration of the ball during its upward, and downward motion. (source 1 : data.gouv.fr, source 2 : medicaments.gouv.fr) Statistiques globale Statistiques globales (Remboursements total annuel) Remboursement par an et par titulaire (b) Magnitude of average velocity over an interval of time, and the average speed over the same interval. acceleration is zero at A,B,C and D. Question 3. 3. punctual — punctuality is zero i.e., s = 0. Then she told me this story. 28. Write ‘True’ or ‘False’ against each of the following statements. 15. If O is regarded as the origin for both time and distance, then at t = 9.00 am, x = 0 He set up there as a shopkeeper. He spent hours looking at that face. He was inspired to be noble, kind and helpful. (b) The graph shows that velocity changes again and again with the passage of time and every time losing some speed. (a) with zero speed at an instant may have non-zero acceleration at that instant. 19. Question 3. If it ______ (rain) today, we ______ (not) go to the play. Moreover, as x is becoming more negative with time, it shows that v is also – ve (i.e., v < 0). OA is the x-t graph of the motion when the woman walks from her home to office. Hurry up! Answer: Graph (a) represents two positions at the same time which is not possible. Relative position of second stone w.r.t. Did it come true? The instantaneous speed is always equal to the magnitude of instantaneous velocity. Who was Ernest? Question 3. Question 1: The driver of B decides to overtake A and accelerates by 1 ms-1. The velocity-time graph of a particle in one-dimensional motion is shown below. Gathergold was a young man when he left his native valley and settled at a distant seaport. If after 50 s, the guard of B just brushes past the driver of A, what was the original distance between them? (b) Suppose, in the above example, the particle takes time t to cover the whole journey. I was______ surprised to see him at the railway station. Get a 15% discount on an order above $ 120 now. In this case of small interval of time, the magnitude of the displacement is effectively equal to the distance travelled by the particle in the same interval of time. How did Ernest grow up to be a mild and quiet youth? Thus in 8 s he covers only 2 m, as shown in the graph he would fall in the pit in 37 s. While the average speed of the particle over the same time-interval is =Total path length /Time-interval= 2 AB /t The old prophecy about the Stone Face was that at some future day a child would be born there who will grow up to become great and noble. Determine graphically and otherwise how long the drunkard takes to fall in a pit 13 m away from the start. relative to the jet plane. (i) At t = 0.3 s, x < 0 i.e., x is in -ve direction. Two cars B and C approach car A in opposite directions with a speed of 54 km h-1 each. The child would look like the Stone Face. either parent=9 km h-1 7. A boy standing on a stationary lift (open from above) throws a ball upwards with the maximum initial speed he can, equal to 49 m s-1. Answer: Question 3. His wealth had disappeared before his death. The prophecy is a statement about some event in future. (ii) during the downward motion of ball after reaching the highest point, x, v and a = g all the three quantities are positive. = vc – u0 = (vc – vj) + (vj – v0) = (-1500 + 500) km h-1 = -1000 km h-1. 3. Young Ernest wished that the stone face could speak. Question 3. A player throws a ball upwards with an initial speed of 29.4 ms-1. What was the story attributed to the Stone Face? So, at t = 5.06 pm, x = 0 (b) (A/B) starts from the school earlier than (B/A). She showed it by brushing away viciously at Margaret’s hair, under pretence of being in a great hurry to go … RD Sharma Class 11 Solutions Free PDF Download, NCERT Solutions for Class 12 Computer Science (Python), NCERT Solutions for Class 12 Computer Science (C++), NCERT Solutions for Class 12 Business Studies, NCERT Solutions for Class 12 Micro Economics, NCERT Solutions for Class 12 Macro Economics, NCERT Solutions for Class 12 Entrepreneurship, NCERT Solutions for Class 12 Political Science, NCERT Solutions for Class 11 Computer Science (Python), NCERT Solutions for Class 11 Business Studies, NCERT Solutions for Class 11 Entrepreneurship, NCERT Solutions for Class 11 Political Science, NCERT Solutions for Class 11 Indian Economic Development, NCERT Solutions for Class 10 Social Science, NCERT Solutions For Class 10 Hindi Sanchayan, NCERT Solutions For Class 10 Hindi Sparsh, NCERT Solutions For Class 10 Hindi Kshitiz, NCERT Solutions For Class 10 Hindi Kritika, NCERT Solutions for Class 10 Foundation of Information Technology, NCERT Solutions for Class 9 Social Science, NCERT Solutions for Class 9 Foundation of IT, PS Verma and VK Agarwal Biology Class 9 Solutions, NCERT Solutions for Class 8 English Honeydew, NCERT Solutions for Class 8 English It So Happened, NCERT Solutions for Class 10 Science Chapter 1, NCERT Solutions for Class 10 Science Chapter 2, Periodic Classification of Elements Class 10, NCERT Solutions for Class 10 Science Chapter 7, NCERT Solutions for Class 10 Science Chapter 8, NCERT Solutions for Class 10 Science Chapter 9, NCERT Solutions for Class 10 Science Chapter 10, NCERT Solutions for Class 10 Science Chapter 11, NCERT Solutions for Class 10 Science Chapter 12, NCERT Solutions for Class 10 Science Chapter 13, NCERT Solutions for Class 10 Science Chapter 14, NCERT Solutions for Class 10 Science Chapter 15, NCERT Solutions for Class 10 Science Chapter 16, CBSE Previous Year Question Papers Class 12, CBSE Previous Year Question Papers Class 10. (d) with positive value of acceleration must be speeding up. Answer: first is given by x2 (t) – x1 (t) = 15t Why didn’t you turn up at the meeting? As it is evident from the shape of v-t graph that acceleration of the particle is not uniform between time intervals t1 and t2. Did Ernest see in Gathergold the likeness of the Stone Face? (d) A and B reach home at the (same/different) time. Now, time taken to return home by an auto = 2.5/5 h =1/10 h =6 minute Online shopping from a great selection at Movies & TV Store. Question 1: Answer: Question 3. Will the people of the valley welcome me? In S.H.M., acceleration, a – x or a = – kx. Check the spelling of the new words. Answer: For first stone, How did people’s opinion change about Gathergold after his death? (d) A tumbling beaker that has slipped off the edge of table. A three – wheeler starts from rest , accelerates uniformly with 1 m s-2 on a straight road for 10 s, and then moves with uniform velocity .plot the distance covered by the vehicle during the n th second (n=1,2,3……..) versus n. what do you expect this plot to be during accelerated motion: a straight line or a parabola? Question 3. 18 minute i.e.18/20 h. Question 3. Choose suitable scales and plot the x-t graph of her motion. I have tried so many combinations of key words in Google to try to find this movie but I just can't find this. (b) with, zero speed may have non-zero velocity. Question 3.14. (d) Again a tumbling beaker slipped off the edge of a table cannot be considered as a point object because distance covered is not much larger. What made people believe General Blood- and-Thunder was their man? A man cycling with a speed of 20 km h-1 in the direction A to B notices that a bus goes past him every 18 min in the direction of his motion, and every 6 min in the opposite direction. (b) At the highest point, velocity of ball is zero but acceleration (g = 9.8 ms-2) in vertically downward direction. Speed of combustion products w.r.t. Along positive-axis, one division equals 0.5 km. I left the valley of the Great Stone Face fifty years ago. (i) during upward motion of ball before reaching the highest point position (as well as displacement) x = +ve, velocity v = -ve and acceleration a = g = +ve. (You will learn about this motion in more detail in Chapter 14). Figure gives the x-t plot of a particle executing one¬dimensional simple harmonic motion. Question 4: He would become the greatest and noblest person of his age. Answer: In x-t graph of Fig. A youngman named Gathergold had left the valley many years ago. (c) A uniformly moving cricket ball turned back by hitting it with a bat for a very short time-interval. Two stones are thrown up simultaneously from the edge of a cliff 200 m high with initial speeds of 15 ms-1 and 30 ms-1. What is the average speed of the particle over the intervals in (a) and (b)? Place the four strips of glass upon one of the sheets of glass and fix in an exact square, leaving a 1/2 inch opening, with seccotine or any good fixer. In which interval is the average acceleration greatest in magnitude? What is the speed of the latter with respect to an observer on the ground? Answer: Distance covered while walking = 2.5 km. How much time does the ball take to return to his hands? It made the land fertile with its gaze. Question 2: Read each statement below carefully and state with reasons and examples, if it is true or false; A particle in one-dimensional motion 23. We would like to show you a description here but the site won’t allow us. Some people thought it was just idle talk. The rocks were put one over the other on the mountain side. Choosing the positive direction as the constant direction of motion, give the signs of v and a in the three intervals. They welcomed me and shouted, “Sure enough, the old prophecy is true and the great man has arrived at last”. Answer: Question 5: 21. I thought he was not coming. (c) with constant speed must have zero acceleration, Man 2's wife works or volunteers there and ends up taking care of him. No more deep blue skies or crimson and amber tints. Get from an ant-hill about twelve ants (the yellow ants are best, as the red are inclined to be quarrelsome), a few eggs, and one queen. What minimum acceleration of car B is required to avoid an accident? Juli 2017 – 2 BvR 2003/14 Der folgende Screenshot zeigt, wie nützlich die neue Funktionalität ist: Hier ein Beispiel-Dokument: BAG 26.04.2018 – 8 AZN 974/17 Du Côté de Chez Swann = Swann's Way (À La Recherche du Temps Perdu = In Search of Lost Time #1), Marcel Proust Writing about this series of novels should be a separate book in itself. What was the prophecy connected with the Stone Face? The Great Stone Face was the work of nature. When this stone hits the ground, x1(t) = 0 .-. Note: In both the above cases, the two quantities are equal if the particle moves from one point to another along a straight path in the same direction only. I was_____ surprised to see him at the railway station. Question 3. Answer:  (a) The railway carriage moving without jerks between two stations, so the distance Look at the following words. (iii) 0 to 40 min? 13. Complete each sentence below using the appropriate forms of the verbs in brackets. Answer: Distance covered while walking = 2.5 km. Therefore, there is no distinction between instantaneous velocity and speed. NCERT Solutions for Class 11 Physics Chapter 3 Motion in a Straight Line are part of Class 11 Physics NCERT Solutions. Question 2: Time=0.05 km/9k h-1=0.0056 h =20 S What is the significance of the Great Stone Face? Question 3. Question 3: (e) (A/B) overtakes (B/A) on the road (once/twice). Ernest never forgot of the story that his mother told him. So that I may very likely be able to send to you not twenty-five, but thirty roubles. Two trains A and B of length 400 m each are moving on two parallel tracks with a uniform speed of 71 km h-1 in the same direction, with A ahead of B. As pointed out earlier, the man covers 2 m in 8 s so, he will cover 8 m in 32 s. But at the end in 5 s he would cover another 5 m i.e., 32 s + 5 s = 37 s, he would cover 8 m + 5 m = 13 m. Thus, he would fall in the pit in 37th second. Explain clearly, with examples, the distinction between: (b) A starts earlier for school than B, because t = 0 for A but for B, t has some finite time. Topics and Subtopics in NCERT Solutions for Class 11 Physics Chapter 3 Motion in a Straight Line: NCERT Solutions Class 11 PhysicsPhysics Sample Papers. 24. At the highest point, speed is zero but the acceleration is non-zero. This motion is represented by the straight line BC in the graph. Question 3. The equations (a), (b) and (e) represent uniform acceleration. Question 3: Ernest loved his mother and helped her in her work. The buses playing in the direction of motion of the cyclist go past him after every Add-iv to each of the following adjectives, then use them to fill in the blanks. 26. His Mother told him the prophecy about that Face. (iii) At t = -1.2 s, x < 0, but here on increasing the time t, value of x becomes less negative. Question 1: Question 2: He fell over the step and ______ broke his arm. If the ball returns to boy’s hands after a time t, then displacement of ball relative to boy Ernest was a little boy who lived with his Mother in a valley. Along time-axis, one division equals 1 hour. What is the period T of the bus service and with what speed (assumed constant) do the buses ply on the road? Path length never decreases. The glass must be carefully cut so as to fit exactly. between two stations is considered to be large as compared to the size of the train. (c) (A/B) walks faster than (B/A). 17. x1 (t) = x (0) + v (0) t + 1/2 a t2 8. (c) True. After Gathergold’s death as his wealth and gold had already disappeared, it was generally agreed that Gathergold had no resemblance with the Great Stone Face.