CAIE IGCSE Physics 1.2.9 Acceleration As Change in Velocity Per Questions

Practise defining acceleration as change of velocity per unit time and calculating it from motion data in Cambridge IGCSE Physics problems.

Exam points

Define acceleration as the rate of change of velocity and calculate average acceleration from changes in velocity and time.

[Maximum number: 1]

A ball of mass 130 g is launched from the ground at an initial velocity of $14 \mathrm{~m} / \mathrm{s}$ vertically upwards. It decelerates until it is at rest momentarily at a height h above the ground.

The acceleration of free fall is $9.8 \mathrm{~m} / \mathrm{s}^{2}$ .

Show that the time taken for the ball to reach height h is 1.4 s. Ignore the effect of air resistance.

$a=\Delta v /(\Delta) t \mathbf{A N D}(\Delta t=) 14 / 9.8 \mathbf{O R}(\Delta t=) \Delta v / a=14 / 9.8$

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CAIE IGCSE Physics 1.2.9 Acceleration As Change in Velocity Per Questions question 1