Energy
What unit of measurement does energy use?
Joules (j)
What unit of measurement does power use?
Watts (w)
What unit of measurement does force use?
Newtons (N)
What unit of measurement does work use?
Joules (j)
How do you calculate Etot? (Total Energy)
KE + PE
What is the definition of power?
How fast you do work.
If a ball is at the top of a hill, and it has the potential to roll down and onto cars below, what energy does it have?
PE (potential energy)
What is the definition of work?
Work is applying force to distance.
What is the definition of Energy?
Energy is the ability to do work or cause change.
If a skater is rolling down a ramp, at about 3/4ths of the way down, would they have more KE (Kinetic Energy) or PE (Potential Energy)?
They would have more KE (Kinetic Energy)
If you are holding a bag in your arms and walking forwards, are you doing work?
No, because the force and distance are in two different directions.
How do you calculate PE (Potential Energy)?
m x g x h
If you have the units of power and time provided for you, what can you find?
Force (p x t)
A horse and a mouse are both walking forwards at the exact same speed. Which animal is doing more work?
The horse, because it has more mass.
How do you calculate KE (Kinetic Energy)?
1/2 x m x v2
How do you calculate power?
force / time
How do you calculate force?
p x t
How do you calculate work?
f x d