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Motion And Time

Question

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Which of the following relations is correct?
(i) Speed = Distance × Time
(ii) $Speed = \frac{Distance}{Time}$
(iii) $Speed = \frac{Time}{Distance}$
(iv) $Speed = \frac{1}{Distance \times Time}$

Solution

(ii) Speed of an object is given by the relation

$Speed = \frac{Distance}{Time}$

Some More Questions From Motion and Time Chapter

Classify the following as motion along a straight line, circular or oscillatory motion:
(i) Motion of your hands while running.
(ii) Motion of a horse pulling a cart on a straight road.
(iii) Motion of a child in a merry-go-round.
(iv) Motion of a child on a see-saw.
(v) Motion of the hammer of an electric bell.
(vi) Motion of a train on a straight bridge.

Which of the following are not correct?
(i) The basic unit of time is second.
(ii) Every object moves with a constant speed.
(iii) Distances between two cities are measured in kilometres.
(iv) The time period of a given pendulum is not constant.
(v) The speed of a train is expressed in m/h.

Show the shape of the distance-time graph for the motion in the following cases:
(i) A car moving with a constant speed.
(ii) A car parked on a side road.

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