Question

A bullet of mass 10g is fired with a velocity of 80 m/s. What is the kinetic energy?​

Answer 1

Hey there!

Answer:

K.E = 32 joules

Explanation:

Given,

Mass = 10 g = 0.01 kg

Velocity (v) = 80 m/s

K.E = ?

We know,

K.E = 1/2 * mv²

      = 1/2 * (0.01) * 80 *80

     = 32 J

Hope It Helps You!

Answer 2

Given:

• Mass of bullet = 10 grams
• Velocity = 80 m/s

To find:

• Kinetic Energy of bullet ?

Calculation:

• Kinetic energy is defined as a type of mechanical energy possessed by an object by the virtue of its motion.

The general equation of Kinetic Energy:

$\boxed{KE = \dfrac{1}{2} \times m \times {v}^{2} }$

Putting necessary values in SI UNITS:

• 10 g = 10/1000 = 0.01 kg

$\implies KE = \dfrac{1}{2} \times 0.01\times {(80)}^{2}$

$\implies KE = \dfrac{1}{2} \times 0.01\times 6400$

$\implies KE = \dfrac{1}{2} \times 64$

$\implies KE = 32 \: joule$

So, kinetic energy of the bullet is 32 Joule.