GT - Levers, moments and gears Quiz

What is the formula to calculate the moment of a force?

• Moment = Force / distance from pivot

• Moment = Force + distance from pivot

• Moment = Force x distance from pivot

• Moment = Force - distance from pivot

What is the size of the clockwise moment?

• 267Nm

• 48Nm

• 24Nm

• 1.2Nm

What is the size of the anticlockwise moment?

• 24Nm

• 267Nm

• 48Nm

• 1.2Nm

What will happen to the see-saw?

• It will rotate clockwise

• It will rotate anticlockwise

• It will not rotate as it is in equilibrium

• It will not rotate as the moments do not add up to zero

In this example, assume that the weight of the wheelbarrow is zero (Yes - it is unrealistic)

The weight of the load is 200N.

What is the size of the clockwise moment caused by the load?

• 300Nm

• 0.9Nm

• 120Nm

• 55Nm

The weight of the load is 200N.

The wheelbarrow is balanced off the ground.

Calculate the size of the upwards force on the handles.

• 80N

• 70N

• 60N

• 50N

How could the wheelbarrow be changed to make the applied lifting force lower? (Tick 2 boxes)

• Put the load closer to the pivot

• Make the handles longer

• Move the load further from the pivot

• Make the handles shorter

This diagram shows part of a child's bike as it is ridden along. The chain pulls back on the "chainset" with a 500N force. The radius of the "chainring" is 70mm. Calculate the anticlockwise moment of the chain.

• 35,000 Nm

• 3,500 Nm

• 350 Nm

• 35 Nm

The bike is ridden at a constant speed. What can you say about the moment due to the chain and the moment caused by the pedaling force?

• The pedaling moment is greater.

• They are equal in size but opposite in direction

• The chain moment is greater

• They are equal in size and direction

If the anticlockwise moment is 35Nm, calculate the size of the pedaling force.

• 200N

• 233N

• 267N

• 300N