Career Point Coaching Centre Sakrand
Unit 03: Kinematics of linear motion
Q1: A ball of mass M is suspended by a string from the ceiling. The Earth pulls down on1
the ball with a force of magnitude Mg. Consider this to be the action force in Newton’s 3rd Law.
What is the reaction force?
a. The string pulling upward on the object with a force of magnitude mg.
b. The ceiling pulling upward on the string with a force of magnitude mg.
c. The string pulling downward on the ceiling with a force of magnitude mg.
d. The ball pulling upward on the Earth with a force of magnitude very much less than mg.
e. The ball pulling upward on the Earth with a force of magnitude mg.
Q2: Which one of the following pairs of concepts cannot both simultaneously be
constant and nonzero for a body?
a. The speed and velocity.
b. The total distance covered and the displacement.
c. The magnitude of the acceleration and the acceleration.
d. The velocity and the acceleration.
e. None of these.
Q3: Two particles start from rest simultaneously and are equally accelerated. Throughout the
motion, the relative velocity of one with respect to other is.
a. Non-zero and directed parallel to acceleration
b. Non-zero and directed opposite to acceleration
c. Directed perpendicular to the acceleration
d. Zero
Q4: The speed-time graph of an object moving along a solid curve is shown in the adjacent fig. The
distance traversed by the object from t - 0 to t = 3 is –
a. 10/2 m
b. 10/4 m
c. 10/3 m
d. 10/5 m
Q5: The slope of velocity-time graph for uniform motion of an object is a. unity
b. zero
c. infinite
d. more than unity with
some finite value
Q6: Which of the following position-time graphs shows an object moving with negative velocity :
Q7: A 100 m long train crosses a man travelling at 5 km/h, in opposite direction, in 7.2 s, then the
velocity of the train is a. 40 km/s
b. 25 km/s
c. 20 km/s
d. 45 km/s
2
Q8: The vertical height of point P above the ground is twice of that of Q. A stone is projected
downward
with a speed of 5 m/s from P and at the same time another stone is projected upward with the same
speed from Q. Both stone reach the ground simultaneously, then a. PQ = 30 m
b. Time of flight of c. Both (a) and (b) are d. Both (a) and (b) are
stones = 3 s
correct
wrong
Q9: The total vertical distance covered by a freely falling body in a given time is directly proportional to a. time
b. square of time
c. square of acceleration due to gravity
d. product of the time and acceleration due to gravity
Q10: A particle moves with uniform acceleration and v1, v2 and v3 denote the average velocities in the
three successive intervals of time t1, t2 and t3. Which of the following relations is correct?
a. (v1 – v2) : (v2 – v3) = (t1 – t2) : (t2 + t3)
b. (v1 – v2) : (v2 – v3) = (t1 + t2) : (t2 + t3)
c. (v1 – v2) : (v2 – v3) = (t1 – t2) : (t1 – t3)
d. (v1 – v2) : (v2 – v3) = (t1 – t2) : (t2 – t3)
Q11: A ball is thrown vertically upwards. Which of the following graph/graphs represent velocity-time graph of the
ball during its flight (air resistance is neglected)
a.
b.
c.
d.
Q12: The area under acceleration-time graph gives
a. Distance travelled
b. Change in acceleration
c. Force acting
d. Change in velocity
Q13: Which graph represents the uniform acceleration
a.
b
c
d
Q14: Which of the following velocity-time graphs shows a realistic situation for a body in motion.
a.
b.
c.
d.
3
a.
Q15: Which of the following velocity-time graphs represent uniform motion of the same body is:
b.
a.
c.
d.
Q16: Acceleration-time graph of a body is shown.
graph:
a.
b.
The corresponding velocity-time
c.
d.
Q17: The acceleration-time graph of a body is shown below
The most probable velocity-time graph of the body is
a.
b.
Q18: A particle has an initial velocity
c.
d.
and an acceleration of
its speed after 10
second is
a. 7 units
b. 8.5 units
c.
10 units
d.
units
Q19: An automobile, travelling at 40 km/h, can be stopped at a distance of 40 m by applying brakes. If the same
automobile is travelling at 80 km/h, the minimum stopping distance, in metres, is (assume no skidding)
a. 100 m
b. 75 m
c.
160 m
d. 165 m
Q20: All the graphs below are intended to represent the same motion. One of them does it incorrectly. Pick it up.
4
21: A ball is released from the top of a tower of height h metre. It takes T second to reach the ground. What is the
position of the ball in T/3 second?
a. (h/9)metre from the
ground
b. (7h/9) metre from the
ground
c. (8h/9) metre from the
ground
d. (17h/18) metre from
the ground
Q22: From a building, two balls A and B are thrown such that A is thrown upwards and B downwards (both
vertically). If vA and vB are their respective velocities on reaching the ground, then
a. vB > vA
b. vA = vB
c. vA > vB
d. 0