For questions 31 and 32, refer to the followingsituation.31. A girl throws a ball of plasticine verticallyupwards. The ball goes up and eventuallyreturns to the girl. The starting speed of the ballis 20 m s-¹.Which of the following speed-time graphs bestrepresents the motion of the ball? (Neglect airresistance)в уACy32. Assuming that the acceleration due to gravity gto be 10 m s-2, when will the ball return to thethrower?1sAC 4 s20 mI33. Two similar balls are released from a 40 mbuilding at the same time. One falls from thetop while the other from half way up as shownbelow.I11DVCD Time of travelB 2 s10 sDIncrease in speedINDIINSIMEIMAINimplimeinimCAmWhich quantity is the same for both balls?A AccelerationB Final velocity40 m34. Which of the following does not illustrateuniform motion?A A ball rolls along a frictionless surface.A mass is thrown vertically upwards with aspeed of 10 m s-¹.B)C A lift moves vertically upwards past fivefloors at zero acceleration.DA boy runs 70 m along a straight track at aconstant speed. 835. The graph shows how the speed of an objectvaries with time.velocity/m s-¹B30-CD20---..10-Which of the following is correct?A The average speed of the object during thefirst 4 seconds is 20 m s-¹.The acceleration of the object during thefirst second is 20 m s-².The deceleration of the object is 10 m s-².The object is traveling at a constant speedduring the last second.( )4time/s36. A trolley runs down a slope from rest. In thefirst 3 seconds it travels 3.2 m. What is theconstant acceleration?A 0.2 m s-²C 0.7 m s-2SB 0.4 m s-²D 1.6 m s-²( )37. The velocity-time graph of an object is shown inthe diagram below. Which one of the followingis not correct?velocitylenou6timeA The object is under uniform acceleration.The gradient of the graph is the accelerationof the object. @BCThe area S is the total distance travelled intime t.DThe object starts from rest.CHAPTER 2: Kinematics 15

Name: For questions 31 and 32, refer to the followingsituation.31. A girl t
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Description: For questions 31 and 32, refer to the followingsituation.31. A girl throws a ball of plasticine verticallyupwards. The ball goes up and eventuallyreturns to the girl. The starting speed of the ballis 20 m s-¹.Which of the following speed-time graphs

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31. A girl throws a ball of plasticine vertically upwards. The ball goes up and eventually returns to the girl. The starting speed of the ball is 20 m s-¹. Which of the following speed-time graphs best represents the motion of the ball? (Neglect air resistance) A C 32. Assuming that the acceleration due to gravity g to be 10 m s2, when will the ball return to the thrower? A 1s C 4 s 33. Two similar balls are released from a 40 m building at the same time. One falls from the top while the other from half way up as shown below. 20 m B 2s 10 s D B Final velocity C Increase in speed D Time of travel 40 m Which quantity is the same for both balls? A Acceleration 34. Which of the following does not illustrate uniform motion? A A ball rolls along a frictionless surface. B A mass is thrown vertically upwards with a speed of 10 m s-¹. ) 35. The g varies B Which A T fil T C من D A C C 36. A troll first 3 const ve A B C fi T T a 37. The w the di is not D veloc 4 0 0 0

31. A girl throws a ball of plasticine vertically upwards. The ball goes up and eventually returns to the girl. The starting speed of the ball is 20 m s-¹. Which of the following speed-time graphs best represents the motion of the ball? (Neglect air resistance) A C 32. Assuming that the acceleration due to gravity g to be 10 m s2, when will the ball return to the thrower? A 1s C 4 s 33. Two similar balls are released from a 40 m building at the same time. One falls from the top while the other from half way up as shown below. 20 m B 2s 10 s D B Final velocity C Increase in speed D Time of travel 40 m Which quantity is the same for both balls? A Acceleration 34. Which of the following does not illustrate uniform motion? A A ball rolls along a frictionless surface. B A mass is thrown vertically upwards with a speed of 10 m s-¹. ) 35. The g varies B Which A T fil T C من D A C C 36. A troll first 3 const ve A B C fi T T a 37. The w the di is not D veloc 4 0 0 0

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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4. Angel starts to move from point O and travels in a straight line with v=2t cm/s and t is the time in seconds after leaving O. The particle comes to rest at P. Calculate a. The value of t at P b. The acceleration at P c. The distance from O to P 5. A body projected upward from the level ground at an angle of 50° with the horizontal has an initial speed of 4 m/s. (. a. How long will it take to hit the ground? b. How far from the starting point will it strike? c. At what angle with the horizontal will it strike? DYNAMICS 1. What weight W is necessary to start the system of blocks shown in Figure moving to the right? The coefficient of friction is 0.10 and the pulleys are assumed to be frictionless. What are the amount and direction of the frictions (Justify your answer 40 kN 60 kN w 20° 4. The blocks are separated by a solid strut which is attached to the blocks with frictionless pins. If the coefficient of friction for all surfaces is 0.20, a. determine the value of horizontal force P…
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