Question

What is the kinetic energy of a 50kg boy runs at a speed of 4 m/s?

Answer 1

Kintic energy =mV  2  /2 = 50*2  2  /2 = 100 J

Answer 2

The kinetic energy (KE) of an object is given by the formula KE = 1/2 * m * v^2, where m is the mass of the object and v is its velocity.

Plugging in the values given, we have:

KE = 1/2 * 50 kg * (4 m/s)^2 = 1/2 * 50 kg * 16 m^2/s^2 = 400 J

Therefore, the kinetic energy of the 50kg boy running at a speed of 4 m/s is 400 Joules.