Question

A body of mass 5 kg is at rest on a smooth horizontal surface. A horizontal force F acts on it for 4s and ceases to act. If the body travels 40 m in the 5 s, the value of F is

Answer 1

Given :

Mass = 5 kg

Time = 4 s

Distance travelled = 40 m

Time = 5 s

To find :

Force, i.e., F

Calculation :

- We know that

Force = ma

⇒ F = 5 × a

⇒ a = F / 5

- Now, v = u + at

⇒ v = 0 + (F/5) × 4

⇒ v = 4 F / 5

- Now, Speed = Distance / Time

⇒ 4 F / 5 = 40 / 5

⇒ F = 10 N

Answer 2

Explanation:

this is the answer for the question