Edexcel IGCSE Physics B Movement and Position Questions

Practise motion questions using distance-time and velocity-time graphs, speed calculations, acceleration equations and practical measurements.

Exam points

use distance-time graph gradients to compare speeds and identify stationary sections
calculate distance, speed, acceleration or final velocity from substituted equations
use the area under a velocity-time graph to find distance travelled

Covered syllabus points

1.3 Distance-time graphs 1.4 Average speed equation 1.5 Motion practical 1.6 Acceleration equation 1.7 Velocity-time graphs 1.8 Acceleration from graph gradients 1.9 Distance from velocity-time graphs 1.10 Final speed equation

[Maximum number: 7]

The diagram shows a velocity-time graph for a car from the time the driver sees an obstacle in the road until the car comes to rest.

Figure for Question 1 — Edexcel IGCSE Physics

(a)

Calculate the acceleration of the car between 1.8 and 8.0 seconds.

acceleration = ............ m/s^2

[ 3 ]

Marking points:
- use of acceleration $=\frac{\text{change in velocity}}{\text{time}}$
- substitution
- evaluation

Example:
$\text{acceleration}=\frac{-30}{6.2}$ $\text{acceleration}=-4.8\ \mathrm{m\,s^{-2}}$

Accept:
- clear indication that acceleration is gradient
- -4.8 to $-5.0\ \mathrm{m\,s^{-2}}$

Ignore:
- minus sign

(b)

Calculate the braking distance of the car.

braking distance = ............ m

[ 3 ]

(c)

Which of these represents the distance-time graph for the car?

Figure for Question (c) — Edexcel IGCSE Physics — Option A

Figure for Question (c) — Edexcel IGCSE Physics — Option B

Figure for Question (c) — Edexcel IGCSE Physics — Option C

Figure for Question (c) — Edexcel IGCSE Physics — Option D

[ 1 ]

[Maximum number: 3]

The photograph shows infrared heating lamps being used to harden fresh paint on a car.

Figure for Question 2 — Edexcel IGCSE Physics

The infrared heating lamps are placed 1.5 m from the car.

Calculate the time taken for infrared waves emitted from a lamp to reach the car.

[for infrared waves, speed = 3.0 x 10^8 m/s]

time = ............ s

Marking points:
- substitution into $\text{speed}=\frac{\text{distance}}{\text{time}}$
- rearrangement
- evaluation

Example:
$3.0\times10^{8}=\frac{1.5}{t}$ $t=\frac{1.5}{3.0\times10^{8}}$ $t=5.0\times10^{-9}\ \mathrm{s}$

Accept:
- $5\times10^{-9}\ \mathrm{s}$
- $0.000000005\ \mathrm{s}$

Marking guidance:
- Deduct 1 mark for power-of-ten error.

[Maximum number: 3]

The photograph shows a toy called a marble run.

Figure for Question 3 — Edexcel IGCSE Physics

A student lifts a marble from the table to the top of the marble run at point A. They release the marble from point A and it rolls through pipes to reach the bottom of the marble run at point B.

The marble leaves the marble run at point B and rolls across the table.
As the marble rolls, energy is transferred due to the different forces acting on the marble.

The student wants to measure how much energy the marble loses as it moves from point A to point B .

The student needs to measure the speed of the marble as it leaves the marble run at point B .

Describe a method the student could use to measure this speed.

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Covered syllabus points

Question 1

Question (a)

Question (b)

Question (c)

Question 2

Question 3