Definitions
What is mass?
The amount of space an object takes up. (Basically it's weight, but regardless of gravity).
What is the formula for calculating PE?
PE = m x g x h
Define Kinetic Energy: and Give 3 examples
Energy of motion
In calculating PE, and KE energy problems, what unit is used for height?
meters
What is energy?
The ability to do work.
Distance traveled per unit of time?
Speed
Calculate the PE of a rock that has a mass of 60 kg and is 10 m high.
5880 J
Give me one form of Kinetic energy
Radiant
Thermal
Motion
Electrical
In calculting PE and KE problems, what unit is mass?
Kilogram
Why do you come back down when you jump into the air?
Gravity!
What is the difference between kinetic energy and potential energy?
Kinetic energy is motion. 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
Give 5 examples of Kinetic energy
Someone moving down a ski slope
A marble rolling across the floor
Running
Jumping
A bowling ball rolling down the street
What is the definition of energy?
The ability to do work
List 3 forms of potential energy
Gravitational, chemical, stored mechanical, nuclear
What is gravity?
The force that pulls us towards the ground. 9.8 m/s2
A roller coaster is at the top of a 970m hill and weighs 1101 kg. Calculate it.
10,466,106 J
All of these are examples of Kinetic energy except.
Someone skiing down a ski slope
A child is about to let go of a yo-yo.
A man swings an axe towards a log.
A marble roll across a floor.
What is the unit for Kinetic Energy?
Joules (or newton meter)
List 3 forms of kinetic energy.
Motion (mechanical), heat (thermal), sound, light (radiant), electrical
What is height and how is it measured scientifically?
How high, or tall something is, measured in meters.
What has more potential energy a bowling ball or a rubber band? Explain why.
Bowling ball because it has more mass.
The term Kinetic means?
Motion
What unit is used for Potential Energy?
Joules (or newton meter)
What is the law of conservation of energy?
Energy cannot be created nor destryoed, only changed in form.