IB Physics HL A.1.6 Uniform acceleration equations and multi-stage motion Question Bank

Practise IB Physics HL A.1.6 by analysing constant-acceleration stages and linking equations across a complete motion.

Exam points

Combine SUVAT equations across stages while preserving the sign convention and matching boundary values.
Derive a scaling relation for displacement, time or velocity under constant acceleration.
Evaluate whether the uniform-acceleration assumption is valid for the stated physical situation.

[Maximum number: 4]

A ball is released near the surface of the Moon at time t=0. The point of release is on a straight line between the centre of Earth and the centre of the Moon. The graph below shows the variation with time t of the displacement s of the ball from the point of release.

Figure for Question A.1.6—Uniform acceleration equations question 1 — IB Physics HL

(a)

Use the graph to

[ 3 ]

(i)

calculate a value for the acceleration of free fall close to the surface of the Moon.

[ 3 ]

any correct method used;
correct reading from graph;
1.6 to $1.7 \mathrm{~m} \mathrm{~s}^{-2}$ ;

(b)

Calculate the speed of an identical ball when it falls 3.0 m from rest close to the surface of Earth. Ignore air resistance.

[ 1 ]

$\quad 7.7 \mathrm{~m} \mathrm{~s}^{-1}$ ;

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A.1.6—Uniform acceleration equations question 1

Question (a)

Question (i)

Question (b)