Calculate the acceleration in the following situations:

PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

Calculate the acceleration in the following situations: (1) A boy walking along the road changes his speed from

0.6 \text{ ms}^{-1}

1.2 \text{ ms}^{-1}

in a time of 1 minute. (2) The velocity of an electron changes from

0.0 \text{ ms}^{-1}

2 \times 10^7 \text{ ms}^{-1}

in a time of 4.0 ns. (3) An aeroplane approaching an airport changes its speed from

90 \text{ ms}^{-1}

30 \text{ ms}^{-1}

in a time of 20 minutes.