 |
Gravitational Potential Energy - Questions II.4.1
- Describe the type(s) of energy an object has by placing a checkmark (
 ) in the correct column(s).
| Object |
Kinetic Energy |
Potential Energy |
| Diver at the end of a cliff |
|
|
| Acorn falling from a tree |
|
|
| Bicycle moving along a level surface |
|
|
| Tennis ball moving downward |
|
|
| Ice cream float sitting on a counter |
|
|
- What is the potential energy of an 1100 kg elevator at the top of the SGI building in Regina, 150 m above the street?
- An 1800 kg elevator rises a distance of 120 m in 3.0 s.
- Calculate the change in its potential energy.
- What is the minimum power of the motor that lifts the elevator if the force of friction is ignored?
- A ball of mass 0.10 kg is thrown straight up with an initial kinetic energy of 520 J.
- What will be the maximum height of the ball?
- How long will it take to reach this maximum height?
- At maximum height, what is its potential energy relative to
- the level from which it was thrown?
- a reference point 15 m above the point from which it was thrown?
-
- Determine the total mechanical energy of a 250 g baseball if it has a velocity of 30. m/s when it leaves the pitcher's hand.
- If the baseball goes in an arc and has a speed of 22 m/s at its maximum height, what will the maximum height be?
- A student lifts a 1.4 kg box from his desk to a counter that is 0.5 m vertically above his desk. Calculate the change in gravitational potential energy of the box.
|
|
PDF
RTF
