Question

If the kinetic energy of a 10-kilogram object is 2000 joules, its velocity is

Answer 1

Given: K.E.= 2000joules
mass(m)= 10kg
so,
K.E = 1/2mv^2
2000= 1/2 *10*v^2
2000*2 = 10*v^2
4000/10 = v^2
400 = v^2
√(400) = v
so, v= 20 m/s

Answer 2

Answer:

The velocity is 20 m/s.

Explanation:

Given:

Mass of the body m = 10 kg

The kinetic energy of the body is given as

K . E=$\bold{\frac{1}{2} \times m \times v^{2}}$

Where the value of Kinetic energy K.E = 2000 Joules

Where v is the velocity of the body and m is the mass of the body.

So calculating the value of velocity from the above relationship  

We have,

v=$\bold{\sqrt{\frac{2 K \cdot E}{m}}}$

v=$\sqrt{\frac{2 \times 2000}{10}}$

V= 20 m/s.

Therefore the velocity possessed by the body having kinetic energy of 2000J is 20 m/s.