Question

What’s the velocity of an 11-kilogram object with 792 joules of kinetic energy? Use . A. 7 m/s B. 8 m/s C. 9 m/s D. 11 m/s E. 12 m/s

Answer 1

Answer:

kinetic energy = 1/2 mv^2

2 x 792/11 = v^2

v^2 = 144

v = 12 m/s

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^2K.E=21mv2

792 Joules=\frac{1}{2}\times 11\times v^2792Joules=21×11×v2

v=\sqrt{\frac{2\times 792 J}{11}}=12 m/sv=112×792J=12m/s

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