Question

For how many seconds would a force of 8N have to act on a 2kg mass in order to change its velocity from 2m/s to 7m/s.

Answer 1

Answer:

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Explanation:

Given :-

Force = 8N

Mass = 2 kg

Initial velocity (u)= 2m/s

Final velocity (v) = 7m/s

We know, that

Force = mass × acceleration

8 = 2 × v- u / t

8/2 = 7- 2 / t

4 t = 5

t = 5/ 4

t = 1.25 seconds