Physics P2.2 Revision

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When you pedal on a bike where does the energy transfered go to?
It is lost though friction as heat
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What is the realationship between enery and work done?
Energy transfered = Work done
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What is work?
When an obeject is moved by a force we say work has been done on the force
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A wheelbarrow is moved 5m with a force of 50N. How much work is done?
W=F×D 50N×5m=250Nm
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Why do brake pads become warm?
Work is done to overcome friction; is transferred as energy that heats the brake pads and the surroundings
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What is weight?
Weight = Gravitational field strength × Mass (kg)
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What are the units in gravitational potential energy?
Ep (Joules) Mass(kg) change in height (m) Gravitational field strength (N/kg)
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The equation for kinetic energy?
Kinetic enegy (J) = 0.5 × Mass (kg) × Velocity2 (m/s)
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What is elastic potiential energy?
Elastic potiencial energy stored in an object when work is done to change its shape.
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How do we calculate momentum?
P = M × V
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What is the unit of momentum?
kg m/s
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Other cards in this set

Card 2

Front

What is the realationship between enery and work done?

Back

Energy transfered = Work done

Card 3

Front

What is work?

Back

Preview of the front of card 3

Card 4

Front

A wheelbarrow is moved 5m with a force of 50N. How much work is done?

Back

Preview of the front of card 4

Card 5

Front

Why do brake pads become warm?

Back

Preview of the front of card 5
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