Friction

Front

Friction is a

Back

contact force

Front

Which type of friction produces the least resistance?

Back

Rolling friction

Front

Friction always

Back

opposes the motion

Front

Friction can be reduced by using: oil, grease, powder, or all of these?

Back

all of these

Front

The shape of an aeroplane is like a

Back

bird

Front

Friction due to fluids is called

Back

drag

Front

Which of the following is not a smooth surface? (a) Surface of wet soap, (b) Surface of tyres, (c) Glazed tiles, (d) Surface of mirror

Back

Surface of tyres

Front

A toy car released with the same initial speed will travel farthest on: (a) muddy surface, (b) polished marble surface, (c) cemented surface, (d) brick surface

Back

polished marble surface

Front

If we apply oil on door hinges, the friction will

Back

decrease

Front

Force of friction depends on: roughness of surface, smoothness of surface, inclination of surface.

Back

all of these