Review/Definitions
The amount of matter in an object measured in kilograms
What is mass? Units?
Formula for calculating Potential Energy? Define each variable.
What is PE = m x g x h
m= mass (kg)
g= 9.8 m/s^2
h= height above origin (m)
Which has more Kinetic Energy, a ball moving at 3 m/s or 5 m/s?
What is 5 m/s?
In calculating PE problems, the unit used for height?
What is a meter?
What is an elastic collision?
What is a collision in which objects move with independently velocities after the collision
How fast an object is traveling in a certain direction.
What is velocity?
Calculate the PE of a rock that has a mass of 60 kg and is 10 m high.
What is 5880 J
Determine the kinetic energy in a 7 kg ball thrown with a velocity of 21 m/s.
What is 1543.5 Joules?
In calculating PE and KE problems- the unit used for mass?
What is Kilogram?
Variable with most impact on KE and why
What is velocity because it is squared?
The difference between kinetic energy and potential energy?
What is Kinetic energy is motion and Potential energy is stored energy due to it's position (height).
How much potential energy would a 3 kg table have if it's at the top of a hill 117 m high?
What is 3439.8 J
The computer weighs 3 kg and is thrown at a velocity of 5 m/s. Calculate the Kinetic energy.
What is 37.5 Joules?
In calculating KE problems, the unit used for velocity
What is m/s?
List two forms of potential energy and examples
What are gravitational and elastic ?
What is the conservation of kinetic energy.
Which has more potential energy, a calculator on the ground or a calculator on the table 1.5 m high?
What is on the table. (greater height)
Calculate the kinetic energy of a 15 kg cart going 60 m/s.
What is 27,000 J?
Unit is used for PE and KE
What are Joules (or newton meter)?
List 2 forms of kinetic energy.
What is motion (mechanical), heat (thermal), sound, light (radiant), electrical?
Units for height?
what is measured in meters.
Why might there be (slightly) more Potential Energy at the top of a rollercoaster than the total amount of energy at the very end of the ride?
What is some energy is converted to friction, heat, and sound energy?
Susie's pencil weighs 0.05 kg and is dropped from the table 1 m high. The pencil falls at a velocity of 9.8 m/s. What is the pencil's PE?
What is 2.401 J?
Two ways to write the unit for energy (name and units for each one)
What are- Joules = Kg x m2/s2
State the law of conservation of energy
What is energy cannot be created nor destroyed, only changed in form.