Question

A body of 4 kg is lying at rest under the action of constant force it gains the speed of 5 m/s then workdone by the force will be

Answer 1

$\frac{1}{2} m {v}^{2}$
1/2x 4 x 5x5

= 50 Ans

Hope this helps you and please mark as brainliest.

Answer 2

Hey dear,

◆ Answer-
W = 50 J

◆ Explaination-
# Given-
m = 4 kg
v = 5 m/s

# Solution-
Here, work done on the body is kinetic energy provided by given force.
W = K.E.
W = 1/2 mv^2
W = 1/2 × 4 × 5^2
W = 2 × 25
W = 50 J

Therefore, work done by force on the body is 50 J.

Hope this helps you...