Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit
Forces and Motion
367 practice questions
Topics covered
Practice questions
261–270 of 367
Question 261
3 marks · Normal
Answer and see the solution →A cyclist is riding at 20 mph on a dry road. The thinking distance for the cyclist is 6 m. The braking distance is also 6 m. The road suddenly becomes wet.
(a)[1 mark]Calculate the total stopping distance for the cyclist on the dry road.
(b)[2 marks]Explain what will happen to the stopping distance if the road becomes wet. State the reason.
Question 262
4 marks · Hard
Answer and see the solution →A car travels at 50 mph on a wet road surface and an identical car travels at the same speed but on a dry road. Both drivers apply the brakes at the same time when they see an obstacle ahead.
(a)[2 marks]Explain why the car on the wet road will have a longer stopping distance. Refer to the forces involved in your answer.
(b)[2 marks]State two factors, apart from the road surface, that could increase the braking distance for both cars.
Question 263
3 marks · Hard
Answer and see the solution →A driver needs to stop suddenly when a traffic light turns red. The car is moving at a higher speed than usual, and the driver is very tired.
(a)[2 marks]Describe how the driver’s tiredness and the higher speed affect the thinking and braking distances.
(b)[1 mark]Explain the effect of these factors on the total stopping distance.
Question 264
3 marks · Hard
Answer and see the solution →The table below gives the thinking distance and braking distance for a car at two different speeds in ideal conditions.
Speed (mph) Thinking distance (m) Braking distance (m) 30 9 14 60 18 55 (a)[2 marks]Compare how thinking distance and braking distance change when the speed doubles from 30 mph to 60 mph.
(b)[1 mark]Explain why braking distance increases much more than thinking distance as speed increases.
Question 265
2 marks · Easy
Answer and see the solution →Calculate the weight of a bowling ball with a mass of 6.0 kg on Earth. Use .
Question 266
2 marks · Easy
Answer and see the solution →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.
Question 267
2 marks · Easy
Answer and see the solution →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.
Question 268
3 marks · Easy
Answer and see the solution →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.
Question 269
2 marks · Easy
Answer and see the solution →Calculate the weight of a backpack with a mass of 3.0 kg on Earth. Use g = 10 N/kg.
Question 270
3 marks · Easy
Answer and see the solution →A tennis ball is dropped from a balcony. It falls straight down through the air.
(a)[1 mark]State the two forces acting on the tennis ball as it falls.
(b)[1 mark]As the ball falls faster, describe what happens to the size of the air resistance.
(c)[1 mark]Eventually the ball falls at a constant speed. What is the name of this constant speed?