Page 56 - SP015 Past Years PSPM Chapter 1 -5 Ver.2020

PHYSICS PSPM SEM 1 1999 - 2017

27. (a) Total distance travelled from the graph, s = 1875 m
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(b) a 1 = 3.33 m s , a 2 = 0 m s , a 3 = –5.0 m s
28. (a) Yes, because there is change of direction. (b) Yes, the car is able to stop before it hits the tree.
29. s = 67 m
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30. v = 70 m s
31. t = 4.17 s
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32. a = 4.03 m s
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33. v = 42.54 m s
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34. (a) v = 19.7 m s (b) t = 4.63 s

35. Free falling body is vertical motion of a body under gravitational force only. (without air resistance or
any external force). Or Free falling body is a vertical motion at constant acceleration g.

37. (a) t = 2 s
(b) (i) The advertisement board will hit the car. (ii) The advertisement board will not hit the car.
38. (a) H = 11.47 m (b) t H = 1.53 s
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39. (a) Maximum distance from ground = 42.87 m (b) v = 31.78 m s
40. t = 1.53 s
41. t = 0.6 s
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42. (a) s = 17.52 m (b) v = 19.49 m s (c) t = 2.45 s
43. (a) No, the acceleration of the ball is not zero at the maximum height because there is acceration is
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always constant @ g = 9.81 m s .

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44. (a) v = 24.77 m s (b) t = 2.02 s
45. t = 119.63 s
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46. (a) u = 19.62 m s (b) H = 19.62 m
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47. (a) u = 44.29 m s (b) t = 4.51 s
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48. s x = 20 m, v = 39.56 m s at 82.8 below the horizontal, t = 4 s
49. (a) t = 20.2 s (b) s x = 3030 m
50. (a) t = 0.47 s (b) s x = 0.94 m
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51. (a) v = 1.96 m s (b) h = 1.23 m
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52. u x = 3.03 m s
53. (a) t = 0.55 s (b) s x = 1.38 m
54. R = 17.5 m
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55. (a) t = 0.0622 s (b) u x = 482 m s
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56. (b) v = 51.76 m s (d) t = 3.78 s (e) R = 151.2 m
2
u sin 2 
57. H 
2 g
58. (a) h = 11.43 m (b) Direction of the arrow is upward. (c) U = 11.2 J
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59. (a) u = 19.95 m s (b) v = 18.78 m s (c) h = 2.32 m
60. R = 510 m

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61. (a) u = 10.8 m s (b) h = 1.06 m (c) Increase the initial take-off speed and jump angle = 45.
62. (a) t = 3.92 s (b) Distance = 24.98 m (c) v = 29.83 m s -1

63. (a) The displacement and velocity in a projectile motion can be analysed separately in the x- and y-
directions because both displacement and velocity are vector quantities, so they can be resolved into
x- and y-directions.
(b) t = 2.65 s

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64. v = 42.7 m s ,  = 16.7 below horizontal
65. (a) t = 9.21 s (b) x = 638 m
66. (a) t = 1.53 s (b) s = 20.68 m

67. Free fall motion is a motion when the body is not exerted by any force except by the gravitational force.
Projectile motion is a motion that involves the resultant of two motion which is the vertical motion (free
fall) and the horizontal motion (linear motion).

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68. (a) Both motions are under the influence of gravity. (b) u = 8.66 m s

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