Units/Symbols
What are the Units for Force?
(N) Newtons
A student is pushing on a wall with 500N. How much work is being done on the wall?
0J
What does the following equation equal?
Fdcos(theta) = ?
Work
What are the units for Energy and Work?
(J)Joules
When a car comes to a stop, what force does negative work?
Force of Friction
Equation for GPE?
GPE=mgh
What does x represent with the equation for Elastic Potential Energy?
x = displacement (spring or elastic)
Two people climb the same set of stairs. Person A runs to the top. Person B walks to the top. Which person delivers more power?
Person A
Equation for KE?
KE = 1/2 * m * v^2
What are the Units for Power
At the top of a roller coaster the cars have Gravitational Potential Energy. What type of energy do they primarily have when they are at the lowest point of the roller coaster?
Kinetic Energy
Power = Work/Time
What does k represent?
k = spring constant
Daily Double
If the velocity of an oject doubles, by what factor does its kinetic energy change?
EPE = (1/2) * k * x^2