3.5 Calculating Energy
Examples
In the following situations, calculate the increase in potential energy.
Example #1:
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What is the increase in potential energy cause by lifting a 50 kg box to a height of 1.5m? What would be the change in potential energy if he drops the box to the floor? Give it a try before checking the solution. |
Example #2:
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A rock of mass 4.7 kg is lifted from height 2.1 m to 3.0 m. How much of an increase in potential energy was caused? Give it a try before checking the solution. |
Example #3:
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If a person carries a 20 kg box from one shelf to another (same height but 3 m away), what was the change in potential energy? Think about an answer before checking the solution. |
Example #4:
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At the first stage of a roller coaster ride, the 1500kg roller coaster ends up 40 m above its starting height. What was increase in potential energy of the roller coaster? Give it a try before checking the solution. |
