CAIE IGCSE Physics 1.2.8 Acceleration of Free Fall G for an Questions

Practise analysing freely falling objects with gravitational acceleration and motion equations when air resistance is negligible in Cambridge IGCSE Physics problems.

Exam points

Use gravitational acceleration and motion equations to analyse freely falling objects when air resistance is negligible.

[Maximum number: 3]

A student drops a heavy ball from a vertical height of 1.8 m above the ground. The ball then falls to the ground. It does not bounce after hitting the ground.

Calculate the maximum speed of the ball. Ignore air resistance.

Show your working.
maximum speed =

$5.9 \mathrm{~m} / \mathrm{s}$ $(\Delta) E_{\mathrm{p}}=(\Delta) E_{\mathrm{k}}$ OR $E_{\mathrm{p}}$ lost $=E_{\mathrm{k}}$ gained OR gravitational potential energy lost = kinetic energy gained $\mathbf{OR} m g(\Delta) h=1 / 2 m v^{2}$ $v^{2}=2 g(\Delta) h \mathbf{~ OR} v^{2}=2 \times 9.8 \times 1.8 \mathbf{OR} v^{2}=35(.28)$

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CAIE IGCSE Physics 1.2.8 Acceleration of Free Fall G for an Questions question 1