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| Pregunta | Respuesta |
| Which of these is the best way to measure a force? | using a force meter |
| Forces can be | Forces can be both pushes and pulls. |
| What is the unit of force called? | The unit of force is the newton, N. |
| Why does an astronaut weigh less on the Moon than on the Earth? | An astronaut weighs less on the Moon than on the Earth because the force of gravity is weaker on the surface of the Moon than on the surface of the Earth. |
| What is the weight of a 20 kg box on the Earth? | A 20kg box on Earth weighs 200N. |
| What is the pressure exerted by a man standing on one leg? | The pressure exerted by a man standing on one leg is twice the pressure he exerts when standing on two legs. |
| The weight of a 100 N laser printer is spread over 0.5m2. What is the pressure it exerts? | The pressure exerted by a 100 N laser printer spread over 0.5m2 is 200 N/m2. |
| What can we say about the forces on an object that is not moving? | the forces must be balanced |
| What happens to the air resistance on a car as the car goes faster? | As a car goes faster, air resistance increases. |
| A force of 4 N acts on a lever 2 m from the pivot. What is the moment? | The moment is 8 Nm. Remember: moment = force x distance from pivot. |
| One way to increase the turning force on a spanner is to | use a longer spanner |
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