Vocabulary
What does the symbol V stand for when calculating Kinetic energy?
Velocity
What is potential energy?
The stored energy due to position or shape.
What is Kinetic energy?
The energy of motion.
A roller coaster is at the top of the track. What kind of energy does it have?
Potential energy
What does the symbol M stand for when calculating Kinetic energy?
Mass
The more ______, the more potential energy.
Height
/altitude/distance from ground
Which of these has the most kinetic energy?
A. a 25kg fish tank sitting on a table
B. a 50g fish swimming in a fish tank
C. a 7,500kg car parked on a steep hill.
D. a boulder sitting on top of a cliff.
B. a 50g fish swimming in a fish tank
What is a variable must be squared to find kinetic energy?
Velocity
What are the two forms of energy?
Kinetic and Potential Energy
A ball sitting at the top of a hill has more potential energy than the same ball at the bottom because of this factor.
height
Which change would increase the kinetic energy of a moving object the most?
A. reducing the mass by half
B. reducing the speed by half
C. doubling the mass of the object
D. doubling the speed of the object
D. doubling the speed of the object
A truck drives to a rock quarry at a speed of 20m/s.
The truck takes on a load of rocks, which DOUBLES its mass. It leaves at the same speed of 20m/s.
Compare the kinetic energy of the truck as it left the quarry to when it arrived at the quarry.
The kinetic energy doubled as the truck left the quarry.
What is energy?
The ability to do work or cause change.
An object’s potential energy increases as these two factors increase.
Mass and height
What is friction?
A force that resists motion when two surfaces rub against each other.
A person walking up the hill is transforming what kind of energy into what kind of energy?
kinetic energy to gravitational potential energy
True or False: Energy can change from one form to another.
True
This energy change occurs when potential energy changes into kinetic energy as an object moves, and it is called___.
energy transformation
When an object in motion passes its energy to another object is ________.
Kinetic Energy Transfer
What is the energy of an object with mass of 50kg moving at a velocity of 20m/s.
KE= .5 x m x v 2
10,000