The velocity v of a particle varies with time t as

5. (83)
The velocity v of a particle varies with time t as shown. Which of the following graphs best represents the
variation of the displacement s of the particle with time t ?
A. B. C. D.
y
t
E.
v
t
v
t
v
t
v
t
v
t
v
t
v
t
v
t
v
t
v
t
3 m s -1
6m
X Y
0
v
t
v
t
0
v
t
0
v
t
0
0
v
t
0
v
t
s
t
0

MC Question
Chapter 2 Kinematics (MC)2P2
6. (86) (88)
A football player is running at a velocity of 3 m s
-1
due north. After a violent collision with another player, he is
moving at a velocity of 4 m s
-1
due east. Which of the following arrows best represents the direction of his change
of velocity?
A. B. C. D. E.
7. (88)
A boy wished to swim across a river with parallel banks as shown in the diagram below. Assuming the water is
flowing at 0.5 m s
-1
, and the swimming speed of the boy is 1 m s
-1
, along which direction should the boy swim if
he wishes (1) to reach the opposite bank in the shortest time; and (2) to take the shortest route to the opposite
bank?
(l) shortest time (2) shortest route
Y
Z
X
Z
Y
8. (89)
A ball bounces up and down on the ground in the vertical direction. Which of the following graphs best describes
the variation of its acceleration a with time t ?
C.