Work Done
- Created by: thenewl
- Created on: 20-03-17 19:13
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- Work Done
- Definiton
- Forces acting against the pull of gravity
- Measured in Joules (J) - energy
- Example
- Lifting a brick
- Stored chemical energy turns into gravitational potential
- More work is done when...
- The load is bigger
- The load is lifted higher
- Equation
- For an object lifted vertically
- Work done = Weight x change of height
- For an object lifted vertically
- Questions
- A high jumper weighs 600N and jumps 2m to clear a bar. How many joules of energy does she use?
- 600J x 2m = 1200J
- A crane uses 2,000 J to lift a load by 20m. What is the weight of the load?
- 2000J / 20m = 100N
- A high jumper weighs 600N and jumps 2m to clear a bar. How many joules of energy does she use?
- Definiton
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