Question

A ball is projected vertically upwards with kinetic energy E. The kinetic energy of the ball at the highest point of its flight will be
(a) E
(b) ${E}/{\sqrt{2}}$
(c) E/2
(d) zero

Answer 1

We know that, the velocity at the top most point is '0'.. Hence the kinetic energy is 0

As the formula of Kinetic energy contains velocity ( 1/2. m. v^2 ) which is this case is 0

Answer 2

Answer:

The kinetic energy of the ball at the highest point of its flight is zero.

Explanation:

Given a ball is projected vertically upwards with kinetic energy E.

Kinetic energy at a point is given by $E=\frac{1}{2} mv^{2}$

Velocity at the highest point of the flight of the ball will be zero, i.e.,$v=0$

Hence, kinetic energy at the highest point is

                $E=\frac{1}{2} mv^{2}=\frac{1}{2} m\times 0=0$

Therefore, the kinetic energy at the highest point is zero.