Question

a ball of mass 0.2kg is fropped from a height of 10m how much mechanical energy does it have right before it hits the ground assume there is no air resisstance

Answer 1

20 Joules

Step-by-step explanation:

Mechanical Energy is the sum of kinetic and potential energy.

Since energy can only be transferred and cannot be lost, kinetic energy=potential energy.

Now we only need to use one of the formulas to find the answer. In this answer I'll be using the formula for potential energy which is mass × gravitational field strength ×height.

Substitute the values in and using gfs=10, the answer will be 20J.