Introduction to Kinetic Potential Energy

Kinetic and Potential Energy

Energy

The ability to cause change

The ability to do work( force x distance)

Forms of Energy

There are 7 forms of energy:

• Mechanical

• Thermal

• Chemical

• Light

• Sound

• Nuclear

• Electric

Forms of Energy

All of these forms of energy

(Mechanical, Thermal, Chemical, Light, Sound, Nuclear, and Electric)

are either a type of potential energy or kinetic energy

Potential Energy

Is energy that is stored and waiting to be transferred.

It is the energy that an object has based on its height and position.

Potential Energy = mass x height x gravity

(P.E) =(m) (h) (m/s²)

Potential Energy

The higher the object, the greater the potential energy

Examples of potential Energy

Examples of potential energy:

standing on top of a diving board

Examples of Potential Energy

• Standing at the edge of a diving board (gravitational p.e)

• A vase on the top shelf of a book shelf (gravitational p.e)

• Energy stored in your food (chemical p.e)

• Stretch rubberband (elastic p.e)

• An inflated balloon

• When your ferris wheel cart is at the top

• When you sit in that sack/rug at the top of the top of the giant slide at the fair (gravitational p.e)

Examples of Potential Energy

• That nuclear bomb that you used on the other team during CoD also had a type of nuclear potential energy stored in the particles within the nucleus of atoms

• Yes...seriously...it was nuclear potential energy stored and you were able to use it with a score steak

Multiple Choice

What is potential energy?

• The energy an object has due to its position or condition.

• The energy an object has due to its motion.

• The energy an object has due to its chemical composition.

• The energy as object has due to its atomic structure.

Multiple Choice

You throw a ball into the air as shown in the diagram. At what point does the ball have the most potential energy?

• W

• X

• Y

• Z

Multiple Choice

Elastic potential energy is energy stored in an object, such as a spring, due to the object being stretched or compressed. In which position is it most likely that the spring has lost its elastic potential energy?

• W

• Y

• X

• Z

Kinetic Energy

the amount of energy an object has due to its motion

Kinetic Energy

An objects kinetic energy is affected by an objects mass and speed.


The faster an object moves the more kinetic energy the object has. 

 (Increase speed, increase kinetic energy)

 $k.e.=\frac{1}{2}mv^2$  

Examples of Kinetic Energy

• a boulder rolling down a hill

• a basketball falling to a net

• a moving car

• a glass falling on the floor

• an airplane in flight

• Riding a bike

Multiple Choice

On a roller coaster, where is maximum kinetic energy?

• At the bottom of a big hill
• When going around a corner
• When going upside down
• At the top of a big hill

Multiple Choice

When a pendulum swings, at which point is kinetic energy highest?

• 1
• 2
• 3
• 4

Multiple Choice

The faster an object moves, the ________ kinetic energy it has. 

• more
• less
• none of the above
• all of the above 

Multiple Choice

Energy due to motion is ____________ energy. 

• Potential 
• Energy
• Kinetic
• Friction

Now...Let's connect this with what we know about forces

Poll

Which type of energy would represent an object that is still at rest?

• Kinetic Energy

• Potential Energy

Poll

When unbalanced forces work on an object, it leads to which type of energy?

• Potential

• Kinetic