The S.I unit of force is________

• dyne

• newton

• km

• kg

Force is that physical quantity which acts on an object.

• only push

• only pull

• push or pull

• none of these

___________ is that force which acts in opposite direction of motion.

Friction between the two rolling surfaces is _________

• static friction

• rolling friction

• sliding friction

• none of these

When you are hiking on a mountain, friction develops between your shoes and trail is ___________

• rolling friction

• static friction

• sliding friction

the friction between brakes and wheel while driving the car is _________

• static friction

• sliding friction

• rolling friction

Friction used to polish the surfaces is ______

• rolling

• static

• sliding

• none

Friction helps us to ___________

• walk on the floor

• grip an object between our fingers.

• polish surfaces

• all of the above.

The grooves in tyre __________ friction

• decreases

• increases

• do not change

• none of the above

Force affects the

• shape and size

• speed

• direction

• All of the above.