Vocabulary
a unit of energy.
joules
T or F. Shooting a basketball is an example of potential energy.
False
The energy of movement.
kinetic energy
A position where it established that an object has no potential energy?
"On the ground"
energy of heat
What is thermal energy
The type of energy a roller coaster has at the top of the track.
Potential energy
A charged car battery is an example of what type of energy?
potential Energy
This 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
The kinetic energy of a ball at the bottom of a hill equals________.
"the potential energy at the top?"
chemical potential energy
a battery etc.
The type of Energy of a ball is rolling down a hill
kinetic energy
Describe a real-world example where potential energy is transformed into kinetic energy.
a roller coaster going down a hill
The change that 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
What is the law that states energy cannot be created or destroyed, only transformed?
the law of conservation of energy?
gravitational potential energy
a diver have standing on a diving board etc...
The type of potential energy determined by the amount of work gravity does.
Gravitational potential energy
A robot applies 20N of force (F) to lift 2 building blocks 3m (D). The amount of work (W) a robot does?
W=F x D
60J
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.
The kinetic energy of the truck as it left the quarry to when it arrived at the quarry.
"doubled Kinetic Energy"
when you are transfer energy to that object.
Transfer of energy or work
What is the formula for Potential & Kinetic Energy?
KE=M*V2/2
PE= (M)(g)(H)
The transfer of energy of a person walking up the hill is ______ energy to ________.
the transfer of kinetic energy to gravitational potential energy
In the formula for kinetic energy, what two factors are multiplied to determine energy?
mass and the square of speed
The same loaded truck approaches and starts to go up a hill. Its speed slows to 10m/s. The kinetic energy of the truck compared before and after it started to climb the hill.
"truck's kinetic energy exponentially decreased."
A push or pull.
a force