(i) Define velocity. (ii) Distinguish between speed and velocity. (b) A car of mass $1500\ \text{kg}$ moves along a straight, horizontal road. The variation with time $t$ of the velocity $v$ for the car is shown in Fig. 1.1. The brakes of the car are applied from $t = 1.0\ \text{s}$ to $t = 3.5\ \text{s}$. For the time when the brakes are applied, (i) calculate the distance moved by the car, distance = \_\_\_\_\_\_ $\text{m}$ (ii) calculate the magnitude of the resultant…

Physics 9702/21 — May/June 2014

Cambridge AS Level · AS Level Structured Questions · worked solutions for every part, with the mark scheme

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Topics Dynamics · Work, Energy and Power · Kinematics · Forces, Density and Pressure · Deformation of Solids · Waves · +4 more

Q1KinematicsDynamicsFree sample

(a)

(i)

Define velocity.

(ii)

Distinguish between speed and velocity.

(b)

A car of mass $1500\ \text{kg}$ moves along a straight, horizontal road. The variation with time $t$ of the velocity $v$ for the car is shown in Fig. 1.1.

Fig. 1.1

The brakes of the car are applied from $t = 1.0\ \text{s}$ to $t = 3.5\ \text{s}$ .
For the time when the brakes are applied,

(i)

calculate the distance moved by the car,

distance = ______ $\text{m}$

(ii)

calculate the magnitude of the resultant force on the car.

resultant force = ______ $\text{N}$

(c)

The direction of motion of the car in (b) at time $t = 2.0\ \text{s}$ is shown in Fig. 1.2.

Fig. 1.2

On Fig. 1.2, show with arrows the directions of the acceleration (label this arrow A) and the resultant force (label this arrow F).

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Q7Particle Physics5M

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