Question

Neglecting air resistance, a man on a high ladder releases a ball from rest which strikes the ground with 100 J of kinetic energy. If he were to throw it straight upward instead, it will eventually reach the ground with a kinetic energy of 10) ______ A) less than 100 J. B) 100 J. C) more than 100 J.

Answer 1

The correct option is (B) "100 J".

Step-by-step explanation:

The formula of kinetic energy is given by :

`E=(1)/(2)mv^2`

m is mass and v is velocity of object.

In this case, it is mentioned that a man on a high ladder releases a ball from rest which strikes the ground with 100 J of kinetic energy.

If he were to throw it straight upward instead, it will eventually reach the ground with a kinetic energy of 100 J. This is due to the conservation of energy.