Question

A body moves with a speed of 10 ms-1 due East. After 10 minutes, it moves with a speed of 5 ms-1
due West. The change in the
velocity of the body during this time interval is

Answer 1

The change in the velocity of a body during a time interval is -5 metres per second.

Explanation-

This question can be solved by using simple mathematical equations of linear motion.

Initial velocity, u = 10 metres per second

Final velocity, v = 5 meters per second

Time, t = 10 minutes

= 600 seconds.

So, change in the velocity of a body during a time interval is = (v-u)

= (5-10) meters per second

= -5 metres per second

Answer 2

Answer:

A body move

+ 10 meter per second due to East

and,5 ms per second due to West

=∆v bar = vf + vi

= -5-(+10)

= -15 ms -1

=15 ms -1 due to West