Formulas
What is the formula for work?
w = f x d or work = force x distance
Calculate Work: A 25 kg box is pushed across the floor with a force of 5 Newtons for a distance of 10 meters. Label your answer.
50 joules
Where is Potential Energy the highest?
At the top of the first hill
What is stored energy?
Potential Energy (PE)
What 2 factors will increase Potential Energy?
Mass & Height
What is the formula for Potential Energy?
PE = mgh or Potential Energy = mass times acceleration due to earth's gravity times height
Calculate Potential Energy: A child weighing 39 kg (about 86 pounds) jumps off of a 5 meter diving board. Round to the nearest hundredth & label
1,911 joules
Where is Kinetic Energy the highest?
The bottom of the first hill
What is unusable energy?
Frictional Energy (FE)
What force is considered an apparent force and is the feeling that you are being thrown out of your seat?
Centrifugal Force
What is the formula for Kinetic Energy?
KE = 1/2mv2 or KE = .5mv2 or Kinetic Energy = one-half times mass times velocity squared
Which roller coaster is more efficient: % FE = 44% or % FE = 38%?
% FE = 38%
Energy is converted from __________ to __________ as it descends (goes down) a hill
Potential Energy to Kinetic Energy
What is the energy of motion?
Kinetic Energy (KE)
What factor has the most impact on Kinetic Energy?
Velocity
What is the formula for Frictional Energy?
FE = PE - KE or Frictional Energy = Potential Energy minus Kinetic Energy
Daily Double for 800 points - Calculate the Frictional Energy. If the potential energy of the bowling ball is 533.61 joules and the kinetic energy of the bowling ball is 4 joules.
529.61 joules
Where at on the roller coaster should the most frictional energy be?
At the end of the coaster when all the energy has been converted from Potential & Kinetic Energy into frictional energy
What is equal to Potential Energy?
Total Energy
What is the sensation that a rider gets from a ride's movement that is actually a measure of acceleration?
G-Force
What is the formula to find the % of Frictional Energy?
% FE = FE/TE x 100 or % Frictional Energy = Frictional Energy divided by Total Energy times 100
Calculate Kinetic Energy: A bowling ball weighing 3.63 kg (about 8 pounds) is dropped from a height of 15 meters with a velocity of 1.3 meters per second. Round to the nearest hundredth.
3.07 joules
Energy is neither __________ or __________
Created or Destroyed
This compares the efficiency of 2 roller coasters.
Percent of Frictional Energy or % FE
What exactly is Newton?
The force required to move a 1 kg object a distance of 1 meter.