Question

A force of 6N acts horizontally on a stationary mass of 2kg for 4secs. What is the kinetic energy gained by mass?​

Answer 1

144 J

Step-by-step explanation:

F = 6 N

vo = 0

m = 2 kg

t = 4 s

F = ma

6 = 2a

a = 3 m/s²

`s=vot+(1)/(2)at^2`

`=0+(1)/(2) (3)(4)^2`

`=24\ m`

W = Fs

= 6 × 24

= 144 J