Question

The kinetic energy of an object of mass m is moving with
a velocity of 12 m/s is 36 j. Find its mass m.​

Answer 1

$kinetic\: energy=\frac{1}{2}mv^2$

$36 = \frac{1}{2} m \times 12 {}^{2}$

$72 = m \times 144$

$m = \frac{36}{144}$

$m = 0.25$

Answer 2

Answer:

Given,

Kinetic energy (K.E) = 36J

Velocity = 12m/s

To find:-

Mass

We know that, K.E = 1/2mv^2

36 = 1/2×m×144

36 = 72m

m = 36 / 72

m = 0.5kg.