What is the formula for calculating kinetic energy? ke = mv2 ke = 2mv2 ke = m2v ke = 2m2v

Kinetic energy is the energy possessed by an object having some mass and moving at some speed due to its motion. Kinetic energy is given as

KE = (0.5) m v²

where KE = kinetic energy

m = mass of the object in motion

v = speed of the object in motion.

it is a scalar quantity and has only magnitude and no direction.

Explanation :

An object is moving with initial velocity of u and its final velocity is v. If it covers a distance s moving with an acceleration a. So, the relation between them is :

So, ...............(1)

If a force (F = m a) is applied to it then the work is done by it. It is given as :

If u = 0

then,

From work energy theorem, the work done is equal to the change in kinetic energy.

The kinetic energy is possessed due to the motion of an object.

Hence, this is the required solution.

b. lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle

i think it would be 5