Question

body is moving with a velocity 10 m/s. Calculate its kinetic energy in erg if the body is having mass 10 kg. ​

Answer 1

Explanation:

Kinetic Energy = 1/2 × m × v^2

= 0.5 × 10 × 10^2

= 500 J

Answer 2

Answer:-

$\red{\bigstar}$ $\large{\rm\purple{K.E = 5 \times 10^9 ergs.}}$

• Given:-

Velocity of the body = 10 m/s

Mass of the body = 10 kg

• To Find:-

Kinetic energy in ergs.

• Solution:-

We know,

$\pink{\bigstar}$ $\large\boxed{\bf\blue{K.E = \dfrac{1}{2} m v^2}}$

here,

K.E = Kinetic energy

m = mass of the body

v = velocity of the body

Substituting in the Formula:-

→ $\sf{K.E = \dfrac{1}{2} \times 10 \times (10)^2}$

→ $\sf{K.E = 5 \times 100}$

→ $\sf{K.E = 500 \: kg. m^2s^{-2}}$

→ $\bf{K.E = 500 \: J}$

Now, we know:-

$\pink{\bigstar}$ $\large\boxed{\bf\blue{1 Joule = 10^7 \: erg}}$

Hence,

→ $\sf{500 Joules = 500 \times 10^7 \: ergs}$

→ $\bf\green{5 \times 10^9 \: ergs}$