Y7 Force

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1 point

Friction between two bodies can often be a problem. In such cases friction can be reduced by

increasing the area of contact between the surfaces.

lubricating the surfaces in contact.

heating the surfaces in contact.

increasing the roughness of the surfaces.

1 point

When a skydiver opens their parachute, which force slows them down?

Weight

Gravity

Air resistance/Drag

Up thrust

1 point

What is the unit of force called?

the newton, n

the newton, N

the neutron, N

1 point

Which of these is the best way to measure a force?

Using a thermometer

Using a force meter

Using a ruler

1 point

What is the force pushing up on an object in water?

Lift

Friction

Weight

Up thrust

1 point

What force occurs when 2 surfaces rub together?

Heat

Up thrust

Friction

Weight

1 point

What is the force that pushes up on a flying plane?

Lift

Up thrust

Weight

Friction

1 point

If a ball is on Earth and it is then taken to the moon, which of the following will change

Weight

Mass

Both

1 point

Which one of the following is an advantage of friction?

In a car, it wears out the brake pads.

It holds your feet on the ground while you walk.

It requires extra effort to push a box across a floor.

Friction between an aircraft and the air causes extra fuel to be used.

10.

1 point

An astronaut on the moon will weigh one sixth of his weight on Earth. Why is this?

The force of gravity on the moon is one sixth that of the force of gravity on earth.

There is no atmosphere on the moon

There is no force of gravity on the moon.

The astronaut has less mass on the moon

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