Physics 5054/22 — May/June 2023

Cambridge O-Level · Theory · worked solutions for every part, with the mark scheme

questions

marks

105

minutes

Topics Kinematics · Forces · Momentum · Energy, Work and Power · Pressure · Kinetic Particle Model of Matter · +9 more

Q18MKinematicsForcesMomentumFree sample

Fig. 1.1 shows the speed–time graph for a car travelling on a straight horizontal road.

Fig. 1.1

(a)

Describe the motion of the car shown in Fig. 1.1.

(b)

At time $t = 10\text{ s}$ the engine of the car is switched off. The brakes are not applied.

(i)

Name two forces that act on the car to cause the change in motion after $t = 10\text{ s}$ .

(ii)

Suggest why Fig. 1.1 is a curve after $t = 10\text{ s}$ .

(c)

Between $t = 10\text{ s}$ and $t = 20\text{ s}$ the speed of the car changes from $18\text{ m / s}$ to $11\text{ m / s}$ .

The mass of the car is $1200\text{ kg}$ .

(i)

Calculate the change in momentum of the car in this time.

Give the unit of your answer

momentum change = ______ unit ______

(ii)

Calculate the average resultant force exerted on the car during this time.

average resultant force = ______ $\text{N}$

The rest of this paper

9 more questions

Loading the full paper…