Force and Friction Class VI

State true and false: Pressing a door bell is a push

• true

• false

The direction in which the object is pushed or pulled is called

• Direction of object

• direction of force

• both (a) and (b)

• none of these

Push or Pull is called.

• Force

• Gravity

• Weight

• Friction

Which of the following is not the effect of force?

• A force can move a stationary object

• A force can not change the direction of Motion

• A force can change the shape of an object

• A force can change the speed of the moving object

The speed of a falling body normally ________.

• Increases

• decreases

• constant

• (a) and (b)

_________ are forces which require physical contact

• Contact forces

• Non-Contact Forces

• both (a) and (b)

• None of these

The force acts between the two surfaces which are in contact

• Mechanical Force

• Frictional Force

• Muscular Force

• Magnetic Force

The force exerted by an electrically changed object is called

• Magnetic Force

• Mechanical force

• Electrostatic force

• Gravitational force

If the surfaces are quite rough, then the frictional force will be _________

• more

• less

• zero

• none

The characteristics of frictional force is / are –

• It depends on the nature of surface

• It depends on the weight of the moving object

• It always opposes the motion

• All of these