Question

a body travels at a uniform speed of 3m/s for 20 seconds then it stops for 10 seconds and then travels at uniform speed of 2m/sec for 20 seconds what is its average speed during the motion ???
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Answer 1

Answer:

2.5 meters/second

Explanation:

The uniform speed travelled by a body for 20 seconds = 3 m/s

The body stops for 10 seconds.

Again,

The uniform speed travelled by a body for 20 seconds = 2 m/s

We are asked to find out the speed of the body during its motion

The number of seconds the body was in motion = 40 seconds

The average speed for the first 20 seconds = 3

The average speed for the first 20 seconds = 2

Here, we are calculating 2 sets of speed.

So, the average speed = (3 + 2)/2 = 5/2 = 2.5 m / s

Therefore, the average speed of the body during the motion = 2.5 m / s