Forces and Motion

Describe how the condition of the tyres and the road surface affect the braking distance of a car. Explain your answer.

A car is travelling at 60 mph. The thinking distance is 18 m and the braking distance is 55 m. Calculate the total stopping distance.

State what is meant by the 'stopping distance' of a vehicle, and name its two components.

A driver is travelling at 30 mph in dry conditions. The thinking distance for this speed is 9 m and the braking distance is 14 m.

Describe how the following factors each affect a car's braking distance.

Give a brief explanation for each factor.

Calculate the weight of a bowling ball with a mass of 6.0 kg on Earth. Use .

Describe what happens to the forces acting on a skydiver just after jumping out of a plane, and how these forces change as the skydiver speeds up.

An astronaut drops a tool with a mass of 2.5 kg on a planet where the gravitational field strength is 4 N/kg. Calculate the weight of the tool.

Explain why a falling coin eventually stops accelerating and continues to fall at a constant speed. Include what happens to the forces acting on it.

Calculate the weight of a backpack with a mass of 3.0 kg on Earth. Use g = 10 N/kg.