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

Where can a body execute free vibrations?

A nut is opened by a wrench of length 20 cm. If the least force required is 2N, find the moment of force needed to loosen the nut.

A force is applied on (i) a non-rigid body and (ii) a rigid body. How does the effect of the force differ in the above two cases?

Identify the following wires used in a household circuit: The wire is also called as the phase wire.

A half metre rod is pivoted at the centre with two weights of 20gf and 12gf suspended at a perpendicular distance of 6 cm and 10 cm from the pivot respectively as shown below.

1) Which of the two forces acting on the rigid rod causes clockwise moment?

2) Is the rod in equilibrium?

3) The direction of 20 kgf force is reversed. What is the magnitude of the resultant moment of the forces on the rod?

State the S.I. unit of moment of force.

State one way to obtain greater moment of a given force about a given axis of rotation.

What do you understand by refraction of light?

What are contact forces? Give two Example

What are non-contact forces? Give two example

Classify the following amongst contact and non-contact force.

force of tension in a string

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.