Question

Q-9.What do youmean by kinetic energy? derive an expression for the kinetic energy of an object of mass m moving with the velocity v ?​

Answer 1

Answer:

W=ma*(V²-u²/2a)\=(1/2)m(V²-u²) As we assumed object at rest, u=0. W=(1/2)mV² we know that the kinetic energy of a body moving with certain velocity is equal to workdone on the object to acquire that velocity from rest. ∴K.E=1/2 mV²

Answer 2

Answer: Kinetic energy is the energy an object has because of its motion. If we want to accelerate an object, then we must apply a force.

In classical mechanics, kinetic energy (KE) is equal to half of an object's mass (1/2*m) multiplied by the velocity squared. For example, if a an object with a mass of 10 kg (m = 10 kg) is moving at a velocity of 5 meters per second (v = 5 m/s), the kinetic energy is equal to 125 Joules, or (1/2 * 10 kg) * 5 m/s2.