Flashcards
Forces
Cards in this deck (11)
- 1Which of these is the best way to measure a force?using a force meter
- 2Forces can beForces can be both pushes and pulls.
- 3What is the unit of force called?The unit of force is the newton, N.
- 4Why 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.
- 5What is the weight of a 20 kg box on the Earth?A 20kg box on Earth weighs 200N.
- 6What 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.
- 7The 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.
- 8What can we say about the forces on an object that is not moving?the forces must be balanced
- 9What happens to the air resistance on a car as the car goes faster?As a car goes faster, air resistance increases.
- 10A 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.
- 11One way to increase the turning force on a spanner is touse a longer spanner
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- Flashcards on Forces, created by jtrow on 09/05/2013.
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- jtrow
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