Question

An object of mass 25 kg is moving with a uniform velocity of 7 m $s^{-1}$. What is the kinetic energy possessed by the object?

• A. 512 J
• B. 396.7 J
• C. 258.3 J
• D. 612.5 J

Answer 1

The correct option is D 612.5 J

Mass of the object, m = 15 kg
Velocity of the object, v = 7 m $s^{–1}$
Kinetic energy = $\frac{1}{2}m{v}^2$
=$\frac{1}{2}$ x 25 kg x 7 m$s^{–1}$ x 7 m$s^{–1}$
= 612.5 J
The kinetic energy of the object is 612.5 J