Comments on marking of test

1. P2.3 Motion and forces and Topic
2.4 Momentum, energy and power
test 16_17
comments

3. What is the area of a triangle?

4. Mass causes gravity NOT air.
Why does the Earth orbit the Sun?
What causes star formation?

5. weight = force of gravity ≠ gravity

6. its or it’s

7. The maximum speed of a train must be higher
than its average speed. Explain why?

8. What are the units of momentum?

9. ΣF = Δp/t
ΣF.t = Δp

10. stoppers ≠ brakes