Question

Calculate kinetic energy of bullet of mass 100gram, moving with velocity of 20m/s?​

Answer 1

Answer :

Kinetic energy = 1/2 mv square

Mass = 100 g = 0.1 kg

Velocity = 20 m/s

Kinetic energy = 1/2 × 0.1 × 400

Kinetic energy = 20 Joules

Hence, the kinetic energy is 20 J

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Answer 2

Answer:

The kinetic energy of a bullet of mass 100gram, moving with a velocity of 20m/s is 20J

Explanation:

The kinetic energy of an object with mass (m) moving with velocity (v) is given by the formula

$KE=\frac{1}{2}mv^{2}$

From the given question, we have

mass of the moving body $m=100g=0.1kg$

the velocity of the body $v=20m/s$

put the values in the above equation

we get the kinetic energy of the body $KE=\frac{1}{2}*0.1*20^{2}=20J$