# Newton’s laws and lifts

Use these applets to generate questions.

## Empty lift

These questions only require a knowledge of $$F=ma$$. You click to reveal the forces on the diagram, and also click to reveal the answer.

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## Lift with one mass inside

These questions only require a knowledge of $$F=ma$$. You can click to show the forces acting on the system as a whole, the lift alone, or just mass Q. You can also click to reveal the answers.

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## Lift with two stacked masses inside

In addtion to knowledge of (F=ma\), these questions may also require knowledge of Newton’s third law. You can click to show the forces acting on the system as a whole, the lift alone, mass P, mass Q, or P and Q treated as a combined mass. You can also click to reveal the answers.

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