| kinetic energy | ||
| #1 | Determine the kinetic energy of a 625-kg roller coaster car that is moving with a speed of 18.3 m/s. | 1.05 x105 Joules |
| #2 | If the roller coaster car in the above problem were moving with twice the speed, then what would be its new kinetic energy? | KE = 4.19 x 105 Joules |
| #3 | Missy Diwater, the former platform diver for the Ringling Brother's Circus, had a kinetic energy of 12 000 J just prior to hitting the bucket of water. If Missy's mass is 40 kg, then what is her speed? | v = 24.5 m/s |
| #4 | A 900-kg compact car moving at 60 mi/hr has approximately 320 000 Joules of kinetic energy. Estimate its new kinetic energy if it is moving at 30 mi/hr | KE = 80 000 J |
| #5 | A 3 kg ball is rolling 2 m/s. How much kinetic energy does ... How much kinetic energy does it have? m = 3 kg. What is 2 m/s? | m (mass) |
| potential energy | ||
| #1 | A 60-kg person walks from the ground to the roof of a 74.8 m tall building. How much gravitational | 43982.4 |
| #2 | A 70-kg man is walking at a speed of 2.0 m/s. What is his kinetic energy (energy is measured in | 1372 |
| #3 | A 1400-kg car is moving at a speed of 25 m/s. How much kinetic energy does the car have? | 343000 |
| #4 | A 1 kg rock is at a height of 100 meters.What is the rock’s gravitational potential energy at 100 meters high? | 9.8 |
| #5 | Calculate the rock’s gravitational potential energy at 50 m, 20 m, 1 m, and 0 m high. Put the | 490, 196, 9.8, 0 |
| kinetic and potential energy | ||
| #1 | 1. How much potential energy does a 5kg block have if it is 2m above the ground? | 98 |
| #2 | What is the mass of an object that has 40J of potential energy and is 10m above the ground? | 200 |
| #3 | What is the weight of an 8kg object? | 0 |
| #4 | How much work does it take to lift an 8kg object 2m? | 4 |
| #5 | How high up must you lift a 12kg object to give it 72J of potential energy? | 8467.2 |
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| Final Question | |