Vocabulary
What's kinetic energy?
the energy of an object in motion
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
A position where it established that an object has no potential energy
On the ground
What is thermal energy?
energy of heat
A roller coaster is at the top of the track. What kind of energy does it have?
What is Potential
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
The kinetic energy of a ball at the bottom of a hill equals________.
What is potential energy at the top?
What kind of energy does a diver have standing on a diving board?
gravitational potential energy
A ball is rolling down a hill. What kind of energy does it have?
What is kinetic
Which of these statements is an example of energy transfer?
A. an open flame heating a pan of water
B. a plant using sunlight to create glucose
C. turning on a flashlight to create a beam of light.
D. a person rubbing their hands together to warm them.
A. an open flame heating a pan of water
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.
When you do work on an object, what exactly is happening?
You are transferring energy to that object.
What is the type of potential energy determined by the amount of work gravity could do?
What is gravitational potential energy
Describe how energy is different than work.
Energy is the ability to create change in matter.
Work is the transfer of energy from one object to another.
The same loaded truck approaches and starts to go up a hill. Its speed slows to 10m/s. Compare the kinetic energy of the truck before and after it started to climb the hill.
The truck's kinetic energy exponentially decreased.
What is a force?
A push or pull.