Physics-Force-1-ICSE-Std6

Non-contact force does not include

• magnetic force

• gravitational force

• electrostatic force

• force of friction

The force with which the earth pulls the body :

• mass of the body

• weight of the body

• force of friction

• net force

The force of friction depends on: (select all the relevant reasons)

• weight of the body

• area of the surfaces in contact

• electrostatic force

• smoothness or roughness of the surfaces in contact

The disadvantages of friction does not include :

• it causes wear & tear

• it reduces efficiency

• it opposes motion of an object

• it helps efficiency

The minimum force required to roll a body on a surface

• sliding friction

• static friction

• rolling friction

• force of friction

______ is unit of weight.

• N

• kg

• g

• N.kg

Bhutia kicks a moving football. The application of force

• stops the moving body

• produces motion on an object at rest

• deforms a body

• changes the direction of motion

A ball thrown into the sky slows down before starting to fall to the ground. This is an example of

• force of motion

• frictional force

• muscular force

• gravitational force

Weight of a body depends on

• acceleration due to earth's gravity

• frictional forces

• height of the body

• relative motion

Car tyres have groves

• to reduce friction between the tyres and the road surface.

• to increase friction between the tyres and the road surface.

• to provide stability if car is heavily loaded.

• to reduce the gravitational force acting on the vehicle.