Question

(a) Classify the following as motion along a straight line, circular or oscillatory motion:

• Motion of your hands while running
• Motion of a horse pulling a cart on a straight road
• Motion of a child in a merry-go-round

(b) The distance between two stations is 240 km. A train takes 4 hours to cover this distance. Calculate the speed of the train. [5 marks]

Answer 1

(a) The motion of the following bodies can be classified as:

• Motion of your hands while running - Oscillatory motion (1 mark)
• Motion of a horse pulling a cart on a straight road - Motion along a straight line (1 mark)
• Motion of a child in a merry-go-round - Circular motion (1 mark)

(b) Given:
Distance covered = 240 km
Time taken = 4 h (0.5 marks)

We know that speed is distance covered in unit time. (0.5 marks)

So,
$Speed=\frac{Dis\tan ce}{Time}=\frac{240km}{4h}=60km/h$ (1 mark)