Question

the kinetic energy of a body of mass 2kg is 25j find its speed ​

Answer 1

Given :-

Kinetic energy = 25J

Mass of the body = 2kg

To Find :-

Speed (v)

Solution :-

We know,

$\bf Kinetic \: energy,K= \dfrac{1}{2}m {v}^{2}$

Here,

• K = 25J
• m = 2kg

Substitute the given values :-

$: \implies \sf25 = \dfrac{1}{2} \times 2 \times {v}^{2}$

$: \implies \sf 25 = {v}^{2}$

$: \implies \sf v = \sqrt{25}$

$: \implies \bf v = 5$

Speed of the body = 5m/s

Answer 2

Answer:

5 m/s

For explanation, see the attachment.

hope it helps.