Question

What’s the velocity of an 11-kilogram object with 792 joules of kinetic energy?

7 m/s
8 m/s
9 m/s
11 m/s
12 m/s

Answer 1

12 m/s is the answer
 

Answer 2

Answer: The velocity of the object is 12 m/s.

Explanation:

Mass of the object = 11 kg

Velocity of the object = v

Kinetic energy possessed by the object  = 792 Joules

$K.E=\frac{1}{2}mv^2$

$792 Joules=\frac{1}{2}\times 11\times v^2$

$v=\sqrt{\frac{2\times 792 J}{11}}=12 m/s$

Hence, the velocity of the object is 12 m/s.