Vocabulary
What's a joule?
What is unit of energy
The more ______, the more potential energy.
Height/altitude/distance from ground
What is kinetic energy?
The energy of movement.
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?
Gravitational Potential (just Potential is valid)
The type of energy found in car batteries.
What is chemical potential
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
The kinetic energy of a ball at the bottom of a hill equals________.
What is potential energy at the top?
What kind of energy is a battery?
chemical potential energy
A ball is rolling at the bottom of a hill. What kind of energy does it have?
What is kinetic
We know mass is 1:1 to kinetic energy. What is speed to kinetic energy?
exponential
Which change would increase the kinetic energy of a movign 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 increases the total kinetic energy more? Doubling the mass or doubling the velocity?
Doubling the velocity
What kind of energy does a diver have standing on a diving board?
gravitational potential energy
What is the type of potential energy determined by the height of an object?
What is gravitational potential energy
What is the formula for potential energy?
PE = mass x gravity x height
Which of these has correctly calculated the potential energy of a 2kg book sitting on top of a 2m book shelf?
A. 13.8 J
B. 4 J
C. 39.2 J
D. 40.1 J
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 energy conversion is happening when you turn on the lights?
Electrical energy is converted into light (radiant or solar) energy.
What is the formula for kinetic energy?
KE = 1/2 mass x velocity2
A person walking up the hill is transforming what kind of energy to what kind of energy?
kinetic energy to gravitational potential energy
How much kinetic energy does a 2kg bird have while flying 10m/s?
What is 100 Joules of energy
A loaded truck approaches and starts to go up a hill. Its speed slows to 10m/s, from 20m/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 energy conversion is happening when your battery powered alarm clock is going off in the morning to wake you up?
Chemical energy is converted into sound energy.