(English Medium) ICSE Class 10 - CISCE Question Bank Solutions

State one factor on which the magnitude of a non-contact force depends. How does it depend on the factor stated by you?.

State Newton's first law of motion. Why is it called the law of inertia?

Write an expression for the change in momentum of a body of mass m moving with velocity v if  v << c.

State the condition when the change in the momentum of a body depends only on the change in its velocity.

State Newton's Second law of motion. Under what conditon does it take the form F = ma?

Name of S.I. unit of momentum.

Name of S.I. unit of the rate of change in momentum.

State the relationship between force, mass and acceleration. Draw graphs showing the relationship between Acceleration and force for a constant mass.

State the relationship between force, mass and acceleration. Draw graphs showing the relationship between Acceleration and mass for a constant force.

A rocket is moving at a constant speed in space by burning its fuel and ejecting out the burnt gases through a nozzle. Answer the following

1) Is there any change in the momentum of the rocket? if yes, what causes the change in momentum?

2) Is there any force acting on the rocket? if yes, how much?

State Newton's third law of motion.

Name and define the S.I. and C.G.S. units of force. How are they related?

A body X of mass 5 kg is moving with velocity 20 m s^-2 while another body Y of mass 20 kg is moving with velocity 5 m S^-1. Compare the momentum of the two bodies.

Calculate the acceleration produced in a body of mass 50 g when acted upon by a force of 20 N.

A car of mass 600 kg is moving with a speed of 10 ms^-1 while a scooter of mass 80 kg us moving with a speed of 50 ms^-1. Compare their momentum.

A car of mass 600 kg is moving with a speed of 10 m^-1 while a scooter of mass 80 kg is moving with speed of 50 m s^-1. which vehicle will require more force to stop it in the (1) same interval of time (2) same distance

Is moment of force a scalar or a vector?

State two factor on which moment of force about a point depends.

Write the expression for calculating the moment of force about a given axis.

State one way to reduce the moment of given force about a given axis of rotation.