Question

If mass of an object= 80 kg
And it's velocity = 55 meters per second

Find Kinetic energy

(I know this isn't worded properly but just answer the question) ​

Answer 1

Solution:

Mass of the object (m) = 80kg

Velocity of the object (v) = 55m/s

We know that,

$\: \: \: \: \: \: \bigstar\:\: \sf\large\boxed{\tt{{K.E= \frac{1}{2}×mv^2}}} \: \bigstar$

Putting values in the formula

$\implies\sf{K.E =\dfrac{1}{2}× 80 × (55)^2}$

$\implies\sf{K.E=\dfrac{1}{2}×80×3025}$

$\implies\sf{K.E=\dfrac{1}{\cancel2}×{\cancel{242000}}}$

$\therefore\sf{K.E=121000J}$

Answer 2

To Find :

The kinetic energy of the body

__________________________

Given :

• Velocity of Body = 55 m/s
• Mass of Body = 80 kg

__________________________

Formula to be applied :

• Kinetic Energy = ½ × mv²

__________________________

Solution :

Given, Mass of Body = 80 kg

Velocity of Body = 55 m/s

$\tt{ \implies \: ke = \frac{1}{2 } \times m {v}^{2} }$

$\implies \tt{ke = \frac{1}{2} \times 80 \times {55}^{2} }$

$\implies \tt{ke = 40 \times 3025}$

$\implies \tt{kinetic \: energy = 121000}$

hence, Kinetic energy = 1,21,000 J