Lifting things with Electricity - Chapter17 - Foundation Physics
1. pulls down on things. We can use energy to lift things up against gravity. When you raise things to a above the ground they store potential energy.
2. How much of their gravitational potential energy have the cars transferred when they are half way down? none of it half of it all of it
3. The cars are pulled up a slope that is twice as high. How much more gravitational potential energy will cars have at the top of this slope than at the top of the first slope? the same amount as before half as much as before twice as much as before six times as much as before
4. How much more electrical energy do you think would be needed to pull cars to the top of this slope? the same amount as before half as much as before twice as much as before six times as much as before
5. How long will it take the same motor to pull cars up this slope? the same time as before half as long as before twice as long as before six times as long as before
6. Fill in the energy diagram:
7. Which electric motor will have to supply energy fastest? the standard lift the express lift
8. Which electric motor will have to be more powerful? the standard lift the express lift
9. The standard lift has a 5 kW motor. The express lift moves twice as fast. How powerful must the electric motor of the express lift be? kW
What you need to remember:
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