This document discusses different types of energy. It defines potential energy as the energy possessed by an object due to its position or condition, such as height. It provides examples of calculating potential energy of objects at different heights and masses. It also defines kinetic energy as the energy of a moving object, and provides examples of calculating kinetic energy using an object's mass and speed. The document explains that energy cannot be created or destroyed, only converted between different forms.

2. cannot be
created nor
destroyed, only
converted from one
form of energy to
another.

3. ENERGY-
ability to do
work

4. POTENTIAL ENERGY
It is the energy
possessed by a body due
to its position or
condition.

7. Question 1: A mass of 2Kg is
taken from the ground to the
height of 10m. Find the potential
energy of the object.
Sample Problems
Question 2: A mass of 5Kg is taken
from the ground to the height of
100m. Find the potential energy of
the object.

8. A fruit hangs from a tree and is
about to fall to the ground of 10
meters height. It has a potential
energy of 22.5 J. Calculate the
mass of the fruit.
Sample Problems
An object of mass 30 kgs is placed on a
hill top of height 80m. What is the
potential energy possessed by the
object?.

9. 1. Calculate the potential energy of a
50kg boulder at the ledge of a cliff 250 m
high.
2. Suppose the diver at the top of a 10.0
m high diving platform has a mass of
50.0 kg. Find the diver’s Potential
energy.

10. KINETIC ENERGY
• It is the energy of a moving
object or energy in motion.
• The word kinetic comes from
the Greek word kinetikos which
means moving.

11. KINETIC ENERGY
*doubling the mass in the formula would double
the KE. However, Doubling the speed would
quadruple the KE, since KE is proportional to the
square of an object’s speed.

12. KINETIC ENERGY
A 0.10 kilogram bird is flying at a
constant speed of 8.0 m/s. what
is the bird’s KE?

13. KINETIC ENERGY
A ball has a mass of 2Kg, suppose it travels at
10m/s. Find the kinetic energy possessed by it.
A ball has a mass of 10Kg, suppose it travels at
100m/s. Find the kinetic energy possessed by it.