Page 15 - Pra U STPM 2021 Penggal 1 - Physics

Physics Term 1 STPM Chapter 2 Kinematics
5. The figure below represents the motion of 8. A puck slides across an icy surface and travels a
a ball rebounding from the floor after being distance x in time t under uniform retardation.
released from a point above the floor. What is Which of the following when plotted to
the quantity represented on the y-axis? represent the motion of the puck would give
a straight-line graph?
y
A x against t C x against t 2
t
2 B x against t D x against t 2
t
9. A car starts from rest and accelerates at
–1
–2
0 Time 2.0 m s when a lorry moving at 16 m s in the
same direction passes it. What is the distance
A Displacement C Acceleration travelled by the car when it overtakes the
B Velocity D Kinetic energy lorry?
A 16 m C 64 m
6. A falling stone strikes a soft ground at speed u B 32 m D 128 m
and decelerates uniformly until it stops. Which
one of the following graphs best represents the 10. The velocity-time graph of an object is as
variation of the stone’s speed v with distance shown in the figure.
s moved into the ground?
A v C v Velocity

u u

s 0 s
0
0 Time
B v D v t 1 t 2
Sketch
u u
(a) the displacement-time graph,
(b) the acceleration-time graph.

11. A particle moves in a straight line with
0 s 0 s
uniform retardation. At time t = 0, its speed is
u and its displacement from the origin is zero.
7. The graph below shows the variation with time Sketch labelled graphs to show how
t of the velocity v of a bouncing ball, released (a) the velocity v of the particle,
from rest. Downwards velocities are taken as (b) the displacement s of the particle from the
positive. At which time does the ball start to origin,
leave the floor on the rebounce. vary with time t.
Explain the relation between the graphs.
v
12. A ball is released from rest from a height of
1.00 m. It falls freely to the floor and rebounces
to a height of 0.80 m. Neglecting the time of
0 Time impact with the floor, sketch the velocity-time
A B C D
graph of the motion, taking upwards velocity
as positive.

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