AS Applied Science Unit 2
Assignment 2
1. A child lets go of a ball and it falls to the ground. What energy transfer takes place as the ball falls?
2. Describe how you would accurately measure the velocity of a car travelling down the road in front of the school using simple laboratory equipment.
3. Complete this table
| Object | mass (kg) | velocity (ms-1) | Kinetic energy |
| cricket ball | 0.2 | 12 | |
| dog | 20 | 9 | |
| car | 1,800 | 40 | |
| lorry | 5,000 | 2.56MJ | |
| toy car | 0.4 | 0.8J | |
| sprinter | 74 | 3.13kJ | |
| bowling ball | 5 | 25J | |
| train | 22 | 7.26MJ | |
| mouse | 3 | 225mJ |
4. Complete this table (use g = 10 N/kg)
| Object | mass (kg) | height (m) | G.P.E. |
| diver | 80 | 5 | |
| lift | 1,200 | 60 | |
| small plane | 2,400 | 14.4MJ | |
| bird | 60 | 120J |
5. Eddie the eagle has a mass of 97kg including his skis. He is waiting at the top of the ski jump ramp which is 120m high.
a) Calculate how much kinetic energy he has at the top of the ramp.
Eddie goes down the ramp. His velocity at the bottom of the ramp is measured at 37ms-1.
b) Calculate his kinetic energy at the bottom of the ramp.
c) Explain why there is a difference between your answers to a) and b) above
d) Describe what happens to the "lost" energy.
6. A parachutist of mass 85kg is falling downwards at a steady velocity of 8ms-1.
a) Calculate her kinetic energy
b) How much g.p.e. does she lose every second?
c) Explain why her kinetic energy is not increasing.
7. What is the Principle of Conservation of Energy?
8. What is the link between work and energy?