Question

Find the kinetic energy (in J) possessed by a body of mass 20 kg moving with a velocity of 4 m/s.

Answer 1

kinetic energy possessed by a body is given by..
K E = 1/2 mv^2
where m is the mass
and v is the velocity of the body
so we get
K E = 1/2 × 20 ×4 ×4
= 160 J

Answer 2

Answer:

The kinetic energy of a body with a mass of 20 kg moving with a velocity of 4m/s is 160J

Explanation:

• The kinetic energy of a moving body with mass (m) and velocity (v) can be calculated as

       $KE=\frac{1}{2}mv^{2}$

From the question, it is given that

mass of the body $m=20kg$

the velocity of the moving body $v=4m/s$

hence the kinetic energy of that body is

$KE=\frac{1}{2}*20*4^{2}$

⇒$KE=160J$