1.
Acceleration
Which of the following description about speed, velocity and acceleration is incorrect?
A Velocity and acceleration are vectors.
B An object can have zero acceleration but non-zero speed.
C If an object with non-zero acceleration, its velocity must not be zero.
D If an object with zero acceleration, its average speed is equal to the instantaneous speed
velocity /ms-1
s1
2.
t/s
The above graph shows the variation of the velocity of a moving object with time. Which of the following
statements is/are correct?
(1) The average velocity of the first 20 seconds is 15 m s1.
(2) The total distance travelled during the first 10 seconds is 112.5 m.
(3) The acceleration of the first 5 seconds is 3 m s2.
A
(1) only
B
(3) only
C
(2) and (3) only
D
(1), (2) and (3)
3.
The following figure shows a stroboscopic photograph of a falling ball. If the stroboscopic lamp flashes 20
times per second, calculate the acceleration of the ball.
A
B
C
D
4.
7.2 m s2
8.4 m s2
9.6 m s2
10 m s2
Which of the following statements about an object with uniform velocity is/are correct?
(1) it travels in a straight line
(2) its speed is constant
(3) it has no acceleration
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
M1 P.1
5.
The acceleration-time graph of a car starting from rest and traveling along a straight road is shown above.
Which of the following graphs correctly shows the variation of the velocity of the car with time t?
6.
The velocity-time graph above represents the motion of a particle along a straight line. Which of the
statements is/are correct?
(1) the acceleration of the particle at t = 5 s is 1 ms-2.
(2) the total distance traveled in 40 s is 200 m
(3) the displacement of the particle after 40 s is 100 m.
A. (1) only
B. (1) and (2) only
C. (1) and (3) only
D. (2) and (3) only
1.
2.
3.
4.
5.
6.
C
D
C
D
C
B
M1 P.2