Question

3. A boy is enjoying a ride on a merry-go-round which is moving with a constant speed of 10 m/s. It implies that the boy is O (a) At rest O (b) In accelerated motion O (c) Moving with no acceleration (d) Moving with uniform velocity​

Answer 1

Answer:

(b) In accelerated motion

Explanation:

Let us analyze all the options one by one :

(a) At rest

The boy cannot be at rest as it is mentioned in the question that he has a speed of 10m/s. Hence this option is incorrect

(b) In accelerated motion

Acceleration is defined as the rate of change of Velocity. And velocity is a scalar quantity, which means its direction and its magnitude both are required to describe a velocity. In this case since the merry go round is going in a circle, the boy is constantly changing his direction of motion while keeping his magnitude of motion same.

Hence we can say that the boy is constantly changing his velocity, which can be said as he is in accelerated motion, which makes this the correct option

c) Moving with no acceleration

False because we proved it in option (b)

d) Moving with uniform velocity​

False because he is constantly changing his direction