Roll No : Name of School : _____ Time : 16:00
Date : 2025-07-13 Name of Assessment : _____
Subject : _____
Class : _____
1 What does the slope of velocity-time graph represent ? 1
Ans : The slope of velocity-time graph represents acceleration.
2 What is the significance of the slope of x−t graph. 1
Ans :
Slope of x − t graph provides velocity of motion. The nature of motion is
identified by the shape of the graph.
3 Write two uses of v − t graph ? 1
(i) Slope of v – t graph gives acceleration.
Ans : (ii) Area under v – t graph gives displacement.
4 When a ball hits a wall with a velocity of 50 m/s and bounces back with the 1
same speed, what is the change in velocity of the ball ?
∆p = – 2 mv = – 100 m
Ans : ∴ m∆v' = – 100 m ⇒ ∆v' = – 100 m/s
5 When a body accelerates by αt, what is the velocity after time ‘t’, when it 1
starts from rest?
Ans :
6 If in case of a motion, displacement is directly proportional to the square of 1
time elapsed, what do you think about its acceleration i.e., constant or variable
? Explain why ?
Ans :
Acceleration is constant, since the equations of motion can be applied only
then.
7 Draw velocity-time graph for an object, starting from rest. Acceleration is 1
constant and remains positive.
Ans :
, 8 A ball is thrown vertically upwards. 2
Draw its :
(i) velocity-time curve
(ii) acceleration-time curve.
Ans :
9 Two bodies of different masses m1 and m2 are dropped from two different 2
heights ‘a’ and ‘b’. What is the ratio of time
taken by the two to drop through these distances ?
Ans :
10The velocity of a particle is v = 5 + 2 (a1 + a2t) where a1 and a2 are constants 2
and t is the time. What is the acceleration of the particle ?
Ans :
11 Two balls of different masses are thrown 2
vertically upwards with same initial
speed. Which one will rise to the greater
height ? Which of the two will come
back with greater speed to the point of
projection ?
Ans :
Since they are thrown with same initial speed, and the equations of motion are
independent of the masses, both of them will rise to the same height and will
have same speed while coming back to the point of projection.
12 In which of the following examples of motion, can the body be considered 3
approximately a point object ?
(a) A railway carriage moving without jerks between two stations.
(b) A monkey sitting on top of a man, cycling smoothly on a circular track.
(c) A spinning cricket ball that turns sharply on hitting the ground.
(d) A tumbling beaker that has slipped off the edge of a table.
Date : 2025-07-13 Name of Assessment : _____
Subject : _____
Class : _____
1 What does the slope of velocity-time graph represent ? 1
Ans : The slope of velocity-time graph represents acceleration.
2 What is the significance of the slope of x−t graph. 1
Ans :
Slope of x − t graph provides velocity of motion. The nature of motion is
identified by the shape of the graph.
3 Write two uses of v − t graph ? 1
(i) Slope of v – t graph gives acceleration.
Ans : (ii) Area under v – t graph gives displacement.
4 When a ball hits a wall with a velocity of 50 m/s and bounces back with the 1
same speed, what is the change in velocity of the ball ?
∆p = – 2 mv = – 100 m
Ans : ∴ m∆v' = – 100 m ⇒ ∆v' = – 100 m/s
5 When a body accelerates by αt, what is the velocity after time ‘t’, when it 1
starts from rest?
Ans :
6 If in case of a motion, displacement is directly proportional to the square of 1
time elapsed, what do you think about its acceleration i.e., constant or variable
? Explain why ?
Ans :
Acceleration is constant, since the equations of motion can be applied only
then.
7 Draw velocity-time graph for an object, starting from rest. Acceleration is 1
constant and remains positive.
Ans :
, 8 A ball is thrown vertically upwards. 2
Draw its :
(i) velocity-time curve
(ii) acceleration-time curve.
Ans :
9 Two bodies of different masses m1 and m2 are dropped from two different 2
heights ‘a’ and ‘b’. What is the ratio of time
taken by the two to drop through these distances ?
Ans :
10The velocity of a particle is v = 5 + 2 (a1 + a2t) where a1 and a2 are constants 2
and t is the time. What is the acceleration of the particle ?
Ans :
11 Two balls of different masses are thrown 2
vertically upwards with same initial
speed. Which one will rise to the greater
height ? Which of the two will come
back with greater speed to the point of
projection ?
Ans :
Since they are thrown with same initial speed, and the equations of motion are
independent of the masses, both of them will rise to the same height and will
have same speed while coming back to the point of projection.
12 In which of the following examples of motion, can the body be considered 3
approximately a point object ?
(a) A railway carriage moving without jerks between two stations.
(b) A monkey sitting on top of a man, cycling smoothly on a circular track.
(c) A spinning cricket ball that turns sharply on hitting the ground.
(d) A tumbling beaker that has slipped off the edge of a table.
