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MCQ on Motion for Students
The reasons of the recoil of gun when fired
1) Before firing, both the bullet and gun are at rest and initial momentum of the system is zero.
2) As soon as the bullet is fired it moves forward with a large velocity.
3) In order to conserve momentum. The gun moves backward with such a velocity that the final momentum of the system is zero.
4) All the above.
Option 4 – All the above.
To stop the moving body
1) we require balanced forces
2) we require unbalanced forces
3) we require single force
4) none of these
Option 1 – we require balanced forces
Inertia of a body depends on
1) mass of a body
2) size of the body
3) material of the body
4) density of the body
Option 1 – mass of a body
Akhtar, Kiran and Rahul were riding in a motorcar that was moving with a high velocity on an expressway when an insect hit the windshield and got stuck on the wind screen. Akhtar and Kiran started pondering over the situation, then choose the correct statement
1) Kiran suggested that the insect suffered a greater change in momentum as compared to the change it momentum of the motor car.
2) Motor car was moving with a larger velocity exerted a larger force on the insect. And as a result the insect died.
3) Rahul was putting an entirely new argument that the same force and a change in their momentum take place in both vehicle and insect.
4) All are wrong.
Option 3 – Rahul was putting an entirely new argument that the same force and a change in their momentum take place in both vehicle and insect.
Two masses are in the ratio 1 : 4 then the ratio of their inertia is
1) 1 : 4
2) 4 : 1
3) 2 : 1
4) 1 : 2
Option 1 – 1 : 4
A ball is thrown vertically upwards. Then its momentum at the highest point is
1) maximum
2) minimum
3) zero
4) indefinite
Option 3 – zero
When a stone is tied to the end of the string and whirled in a circle if the string suddenly breaks then
1) The stone flies off tangentially along a straight line due to inertia of direction.
2) The stone falls down due to inertia of rest.
3) The stone flies off along a curved line due to inertia of motion.
4) None of these
Option 1 – The stone flies off tangentially along a straight line due to inertia of direction.
Action- Reaction forces act on
1) same body
2) different bodies
3) none of the bodies
4) all the above
Option 2 – different bodies
It is easier to stop a tennis ball than a cricket ball moving with the same speed because
1) tennis ball is lighter than the cricket ball
2) It has a smaller momentum
3) smaller force is required to stop the tennis ball
4) all the above
Option 4 – all the above
When a carpet is beaten with a stick, dust comes out of it because
1) It is due to the inertia of rest.
2) It is due to the inertia of motion.
3) It is due to the inertia of direction.
4) none of these
Option 1 – It is due to the inertia of rest.
It is advised to tie any luggage kept on the roof of a bus with a rope because
1) If not because tied with a rope, the luggage may fall behind the bus on the road.
2) As the bus moves ahead with acceleration, the luggage on the roof also moves along with it.
3) Due to inertia of rest or motion, the luggage slides on the roof in the forward or backward (rear) direction
4) All the above
Option 3 – Due to inertia of rest or motion, the luggage slides on the roof in the forward or backward (rear) direction
A batsman hits a cricket ball which then rolls on a level ground. After covering a short distance, the ball comes to rest. The ball slows down to stop because
1) the batsman did not hit the ball hard enough.
2) velocity is proportional to the force exerted on the ball
3) there is a force on the ball opposing the motion
4) there is no unbalanced force on the ball, so the ball would want to come to rest.
The scientist who said that ” an object in motion will remain in same motion as long as no external force is applied ” is
1) Aristotle
2) Galileo
3) Newton
4) Dalton
Option 2 – Galileo
If the net force acting on an object is zero, then the body is said to be in the state of
1) Equilibrium
2) Motion
3) Inertia of motion
4) Uniform motion
Option 1 – Equilibrium
The inertia of a body depends on
1) Shape
2) Volume
3) Mass
4) Area
Option 3 – Mass
Newton used the word ‘ mass in motion ‘ to represent
1) Linear momentum
2) Inertia of motion
3) Third law of motion
4) Inertia at rest
Option 1 – Linear momentum
An object experience a net zero external unbalanced force, then
1) It is possible for the object to travel with a non- zero velocity
2) only non- zero external force causes a motion
3) It is possible for the object to travel with a non- zero change in velocity
4) none of these
Option 3 – It is possible for the object to travel with a non- zero change in velocity
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