Physics 9702/22 — May/June 2020

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

questions

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Topics Kinematics · Dynamics · Work, Energy and Power · Electricity · Physical Quantities and Units · Waves · +4 more

Q1KinematicsPhysical Quantities and UnitsWork, Energy and PowerDynamicsFree sample

Answer all the questions in the spaces provided.

(a)

Define velocity.

(b)

The drag force $F_D$ acting on a car moving with speed $v$ along a straight horizontal road is given by

F_D = v^2Ak

where $k$ is a constant and $A$ is the cross-sectional area of the car.

Determine the SI base units of $k$ .

SI base units = ______

(c)

The value of $k$ , in SI base units, for the car in (b) is 0.24. The cross-sectional area $A$ of the car is $5.1\ \text{m}^2$ .

The car is travelling with a constant speed along a straight road and the output power of the engine is $4.8 \times 10^4\ \text{W}$ . Assume that the output power of the engine is equal to the rate at which the drag force $F_D$ is doing work against the car.

Determine the speed of the car.

speed = ______ $\text{m s}^{-1}$

The rest of this paper

6 more questions

Q2Kinematics · Dynamics10M
Q3Work, Energy and Power · Dynamics · Kinematics9M
Q4Waves · Superposition11M
Q5Deformation of Solids · Electricity9M
Q6D.C. Circuits · Electricity10M
Q7Particle Physics5M

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