Potential vs. Kinetic
Energy Transformations
Work and Power
Simple Machines
100
What is Potential Energy?
Energy stored due to the interactions between objects.
100
A Person Running transfers energy from ______________ to ______________.

A Person Running transfers energy from chemical to mechanical.

100
How do you calculate work and what are the units for work?
W = F x D and the units are Joules.
100
What simple machine includes two inclined planes?
Wedge
200
What is Kinetic Energy?
Energy due to motion.
200

Playing the Drums transfers energy from _________________ to _________________.

Playing the Drums transfers energy from mechanical to sound.

200
How do you calculate power and what are the units for power?
P = W / T and the units are watts.
200
How can you increase the mechanical advantage of a pulley?
Add more pulleys.
300
What happens to the energy of a rock that is sitting on the edge of a cliff before and after it falls off a cliff?
Potential Energy is converted to Kinetic Energy.
300

A Candle Burning transfers energy from ___________ to ____________ and ________________.

A Candle Burning transfers energy from chemical to light and thermal.

300

If a group of workers can apply a force of 56N to move a crate 8m, what amount of work will they have accomplished? 


448J
300
What simple machine is wrapped around a cylinder?
Screw
400

Where is the potential energy the highest as a ball rolls from the top of the hill to the bottom of the hill?

At the top of the hill before it starts rolling.
400

A toaster transfers energy from _____________ to _______________ and ________________.

A toaster transfers energy from electrical to light and thermal.

400

A small motor does 520J of work to move a toy car in 8s.  How much power was developed by the motor?


65W
400
What can you do to a lever so that it has more mechanical advantage?
Move the fulcrum closer to the load or use a longer lever.
500
Where is the kinetic energy the highest as a ball rolls from the top of the hill to the bottom of the hill?
Just before it hits the flat ground.
500
A cell phone transfers energy from ________________ to _________________ then to ___________________ and _________________.

A cell phone transfers energy from electrical to chemical then to light and sound.

500
What are the two things that must occur in order for something to be considered work?
1) The object needs to move

2) The object must move in the direction the force is applied.

500
What simple machine's mechanical advantage is calculated as length divided by height?
Inclined Plane
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