P2 Circular Motion

A motorbike is being driven around a circular bend in a road.

In which direction, A, B, C or D, does the centripetal force act?

• A

• B

• C

• D

What provides the centripetal force on the motorbike?

• Weight

• Friction

• Thrust

• Drag

What happens to the centripetal force if the motorbike is driven round the bend at a higher speed?

• Decreases

• Remains the same

• Increases

• Disappear

What happens to the centripetal force if the motorbike is driven at the same speed around the bend with a smaller radius?

• Decreases

• Remains the same

• Increases

• Disappear

The diagram shows two children playing with a toy called a swing ball. The ball is joined to a pole by a strong string. The children hit the ball so that it goes round in a circular path.

Name the force labelled in the diagram that causes the ball to move in a circle.

• Drag

• Trust

• Weight

• Tension

Choose the correct response;

A larger force is needed to make the ball move in a circular path if:

• the speed of the ball is increased.

• the speed of the ball is decreased.

• the string is made longer.

The continuous acceleration of a ball moving in a circular path changes......

• the speed of the ball.

• the direction of the ball.

• the weight of the ball.

The Moon orbits the Earth in a circular path. Complete the three spaces in the sentence.

The Moon’s ____________ is constant but its _____________ changes because its _____________ changes.

• acceleration, speed, direction

• speed, acceleration, direction

• velocity, speed, direction

• speed, velocity, direction

When any object moves in a circular, or nearly circular, the path a force must act towards the centre of the circle.

What word is used to describe this force?

• Thrust

• Tension

• Centripetal

• Air resistance

The Moon orbits the Earth. What provides the force towards the Earth?

• weight

• drag

• tension

• gravity