Question

If a net force of 7 N was constantly applied on 400 g object at rest, how long will it take to raise its velocity to 80 m/s?​

Answer 1

Answer:

4.57 s

Explanation:

Net force acting on the object, F = 7 N

Mass of the object, m = 400 g = 0.4 kg

Initial velocity of the object, u = 0

Final velocity of the object, v = 80 m/s

Let t is the time taken to reach its final velocity. The net force acting on the object is given by :

F=ma

F=m*v-u/t

F=m*v/t

t=mv/F

t=0.4*80/7

t=4.57 s

So, the time taken by the object is 4.57 seconds. Hence, this is the required solution

Answer 2

Explanation:

answer is in attachment

Hope this will help you out