Physics, asked by ashutosh6343, 1 year ago

a body of mass 4 kg Falls from rest what will be its kinetic energy after 3 seconds is equal to 10 M per second square​

Answers

Answered by shubhamjoshi033
3

After 3 sec the kinetic energy of the body will be 1800 Joules

Explanation :

Kinetic energy of a body is given by,

KE = mv²/2

Given data,

initial velocity = u = 0

acceleration, a = g = 10 m/s²

time = t = 3 sec

from the laws of motion,

v = u + at

=> v = 0 + 10 x 3 = 30 m/s

mass = 4 kg

Hence kinetic energy,

KE = mv²/2

= 4 x 30 x 30/2

= 1800 Joules

Hence after 3 sec the kinetic energy of the body will be 1800 Joules

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