1. Activity Car Safety – Seat Belts Aim To observe the effect of not wearing a seatbelt during a collision. Diagram: Instructions Roll the trolley with the dummy down the ramp with and without the seatbelt on. Copy 04/06/2016

2. Results Write up a short report on what you have learned. nbalanced onstantnbalanced elt

3. 1. A speed boat moving at a steady speed through the water. Engine forceFriction Newton’s First Law. Look at the pictures. Where are the balanced forces?

4. 2 2. A helicopter hovering in the air. Weight Upthrust (upwards Force)

5. 3. A cyclist moving at a steady speed along a level road. Forward forceFriction force

6. Problems Page 32-34, Q. 1 – 10.

7. Non numerical answers 1.Which of the following diagrams show balanced forces? (b) 15 N (c) 30 N (d) 65 N (f) 6 N 8. In a tug of war the blue team pull the red team with a force of 3 000 N to the left. The two teams remain stationary. (c) One of the members of the red team sprains her ankle and has to leave the competition. What would be the force exerted by the red team now? (d) What would happen now? The rope and teams would accelerate to the left.

8. 9.David is doing a parachute jump to raise money for charity. The graph below shows his speed at different points in his journey. Use this graph to answer the questions below. (c) Describe the forces acting on David 15 seconds after he jumped out of the plane. Forces are balanced. Weight down equals air resistance upwards.