Oxford AQA IGCSE · Physics (9203)

Safety in public transport: Practice Questions

2 multiple-choice questions marked as you go, and 4 written questions with worked solutions. All on Safety in public transport.

6 questions27 marksFree, no account

Question 1

1 mark

Which of the following factors would specifically increase the braking distance of a vehicle without having any effect on the thinking distance?

Question 2

1 mark

Which of the following conditions would specifically lead to an increase in the braking distance of a car, without directly affecting the driver's thinking distance?

Question 3

5 marks

Explain, in terms of momentum, how a seat belt reduces the force exerted on a passenger during a sudden deceleration.

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Question 4

5 marks

State two factors that affect the braking distance of a car, excluding the initial speed of the vehicle.

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Question 5

8 marks

A driver is travelling along a straight road at a constant speed when they see a hazard ahead and apply the brakes until the car stops. The motion of the car is shown in the velocity-time graph below.

(a) Use the graph to calculate the thinking distance of the car.
(b) Use the graph to calculate the braking distance of the car.
(c) The car has a mass of \(1200\text{ kg}\). Calculate the kinetic energy of the car before the brakes are applied.
(d) Using your answers from (b) and (c), calculate the average braking force required to bring the car to a stop.

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Question 6

7 marks

The stopping distance of a vehicle is a critical factor in road safety.
(a) A car is travelling at \(25\text{ m/s}\). If the driver has a reaction time of \(0.7\text{ s}\), calculate the thinking distance.
(b) The car’s brakes provide a constant decelerating force. Explain how the braking distance changes if the car's initial speed is doubled to \(50\text{ m/s}\), referring to kinetic energy.
(c) List two factors that increase the braking distance and explain the physical reason for one of them.

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