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

State two conditions for a body acted upon by several forces to be in equilibrium.

State the principle of moments.

A body is provided at a point. A force of 20 N is applied at a distance of 40 cm from the pivot. Find the moment of force about the pivot.

The moment of a force 10 N about a point 0 is 4 Nm. Calculate the distance of point of application of force from the point 0.

A mechanic can open a nut by applying a force of 200 N while using a lever handle of 50 cm length. How long handle is required if he wants to open it by applying a force of only 50 N?

What do you mean by uniform circular motion?

What is a centripetal force?

Name the force needed for circular motion. What is the direction of the force?

What do you mean by a centrifugal force?

What is the work done when the force on the object and the displacement of the object are perpendicular to each other?

Work is a scalar quantity because it is a measure of transfer of energy without indicating any direction

In which one of the following cases is the work done more?  When the angle between the direction of motion and that of the force is (i) 90°     (ii) 0°.

An engine does 54,000 J of work by exerting a force of 6000 N on it. What is the displacement in the direction of the force?

How much force is applied on a body when 150 J of work is done in displacing the body through a distance of 10 m in the direction of the force?

Work done by a force is equal to the product of ....... and ....