Question

A force acts on a body of mass 10 kg for 8 seconds. After the force stops working, the body covers a distance of 80 meters in 5 seconds. Find the value of the force exerted on the body. [Answer: 20 Newtons]​

Answer 1

force acts on a body of mass 10 kg for 8 seconds. After the force stops working, the body covers a distance of 80 meters in 5 seconds. Find the value of the force exerted on the body. [Answer: 20 Newtons]

Answer 2

Answer:

20 N

Explanation:

Let the body starts from rest.

∴u=0

Final velocity (v) = distance / time = 80/5 = 16 m/s

Now, using equation of motion, v = u + at

a= (v-u)/t = (16-0)/8 = 16/8 = 2m/s

Force = mass x acceleration

= 10kg x 2

= 20N