P2a Revision Questions   F  ( part 1 )

In all questions involving calculations remember to show

What equation you are using       Your calculations      and     Don't forget the units on the answer

1. A man walks at a steady speed of 1 m/s for 10 minutes. a) How far will he have travelled?  b) How long will it take him to walk 2 km?

2. A motorbike travels 10 km at a steady speed for 5 minutes. calculate its speed.

3. Below is a distance time graph for a journey. calculate the speed of the object in each of the 4 sections.

4. This shows how the speed of 2 cars changes when they accelerate from rest. a) Which car has the biggest acceleration? How do you know? b) Which will have covered the most distance after 6 seconds? How do you know this fro the graph? c) Calculate the acceleration of car 1 during the first 6 seconds. d) Calculate the acceleration of car 2 during the first 8 seconds.

5.  It is important that you understand the difference between mass and weight.

     a) What is mass measured in?                      b) What is weight measured in?

     c) A girl has a mass of 45 kg. What is her weight on Earth?                 d) Would her weight be the same on the Moon?  Why?

6. The diagram below shows the 4 forces acting on a speedboat travelling at a steady speed. a) Which is bigger, force T or force F?    How do you know? b) The captain of the boat makes force T bigger. What will the boat do? c) What happens to force F when the boat travels faster? d) Explain why the boat has a top speed.

7. Test are done on a small car and a motorbike with the same size engine.

           a) Which has a bigger acceleration?  Why?

           b) Which has a bigger braking distance? Why?

8. Your stopping distance is made up of 2 parts, thinking distance and braking distance.

          a) Say 3 things which will affect your thinking distance only.

          b) Say 3 things which will affect your braking distance only.

          c) Say something which will affect both.