Force and friction (Quiz1)

A charged ruler attracts bits of paper due to :

• gravitational force

• magnetic force

• electrostatic force

• frictional force

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Friction can be reduced by:

• providing wheels

• lubricating

• streamlining

• All of these

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Friction always opposes-

• motion

• force

• weight

• none of these

Identify the true statement:

• static friction is less than rolling friction

• rolling friction is less than sliding friction

• sliding friction is less than rolling friction

• static friction is less than sliding friction

Which of the following help to increase friction:

• oiling of machine parts

• streamlining the ships

• spikes in shoes

• polishing the surface

Identify which statement is false for friction

• friction help us to walk on ground

• friction do cause wear and tear

• friction can be reduced by polishing

• friction produce heat

A car can skid on wet road due to:

• increased friction between the road and the tyres

• streamlined shape of the car

• reduced friction between the road and the tyres

• both (b) and (c)

Name the type of force- a horse move the cart

• mechanical force

• muscular force

• frictional force

• magnetic force

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NGSS.MS-PS2-1

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Which of the following is effect of force

• deform body

• stop the motion

• change the direction

• All of them

Which of the following is contact force

• magnetic force

• electrostatic force

• gravitational force

• none of these