2. What is the formula for work done?

• A) Work done = F x d
• B) Work done = F / d
• C) Work done = m x a
• D) Work done = m / a

3. A tractor pulls a plough 2000m across a field using a force of 8000N. What is the work done?

4. If the same tractor produces the same force and does 2MJ of work, how far did it go?

5. What is the formula for kinetic energy?

• A) k.e.= mv
• B) k.e.= ½ mv
• C) k.e.= ½ mv²
• D) k.e.= mv²

6. A 2kg brick is thrown at 3 m/s. It has a kinetic energy of

• A. 6J
• B. 9J
• C. 3J
• D. 18J

7. If I increase the speed of the brick by 4 times, the kinetic energy will be

• A. 2 times higher
• B. 4 times higher
• C. 12 times higher
• D. 16 times higher

8. To increase the momentum of a battering ram, which two quantities must be increased?

9. A 0.1kg lump of sticky blue tac is thrown at a velocity of 8 m/s. It has a momentum of

• A) 0.08 kg m/s
• B) 0.8 kg m/s
• C) 8 kg m/s
• D) 80 kg m/s

10. The blue tack hits another stationary lump of the same mass. They will stick together and move off at a velocity of..

1. 0.8 m/s
2. 8 m/s
3. 4 m/s
4. 16 m/s

11. The power of a runner or light bulb is measured in joules per second, or more commonly called

• A. watts
• B. joules
• C. volts
• D. newtons

The table below shows the power and energy transferred by some common kitchen appliances. What are the missing values?