Work energy and momentum
- Created by: Aiste
- Created on: 15-01-13 18:34
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Clues
- ____is conserved whenever objects interact provided no external forces act on them. (8)
- all moving objects have momentum. the greater the mass and the greater the ____of an object, the greater the momentum. (8)
- crumple zones in cars reduce the forces acting by ____the time taken to change the momentum of the car. (10)
- Energy ___= work done (11)
- Ep = m x g x h what does Ep stand for? (Change in ___ potential energy) (13)
- in calculations, one direction must be defined as ___ so momentum in the opposite direction is negative. (8)
- we can use the ____ of momentum to find the speed of a car before and impact. (12)
- when two vehicles collide: they exert equal and ____ forces on each other. (8)
- when vehicles collide, the force of the impact depends on mass, change of velocity and the ____ of the impact. (8)
- whenever and object is moved ___ upwards it gains gravitational potential energy equal to the work done on it by the lifting force. (10)
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