Energy
Define energy
Energy is the ability to do work.
If two objects with different weights are moving at the same speed, the lighter object has which of the following?
a. less energy than the heavier object
b. more energy than the heavier object
c. an unpredictable amount of energy
d. the same amount of energy as the heavier object
What is... a. less energy than the heavier object?
Define motion
Motion is a change in an object's position.
Define energy transfer.
What is...An energy transfer is the movement of energy from one place to another place?
Define collision
A collision happens when one object comes into contact with another object.
Felix sitting on his bicycle at the top of the hill is an example of what kind of energy?
What is potential energy?
Josh pushed a soccer ball down a driveway. What is true about the soccer ball?
What is...The applied force is greater than the force of friction?
When electrical energy transfers from a battery to a light bulb, the electrical energy changes into ________ energy.
What is light energy?
Remi threw a baseball and a wiffle ball with the same applied force at a tower of blocks. Which one will knock over more blocks? Why?
In a collision between a moving van and a parked car:
(a) what kind of energy does the van have before the collision and
(b) what kind of energy does the car have before the collision?
What is... A) The van has kinetic energy and is moving toward the car. B) The car has potential energy because it has stopped?
Felix riding his bicycle down the hill is an example of what kind of energy?
What is kinetic energy?
A car and a train travel at the same rate of speed. Which one has more kinetic energy? Why?
What is...The train has more kinetic energy because it is heavier?
How does the weight of an object affect the object's kinetic energy?
Heavier objects have more kinetic energy.
When electrical energy transfers from a battery to a light bulb, the electrical energy changes into ________ energy.
What is light energy?
In a collision between a moving van and a parked car, what happens during the collision?
The van transfers kinetic energy to the car. This is an energy transfer.
A box of crayons falls off the table. As the box falls, what happens?
What is...Potential energy changes to kinetic energy as the box falls.
A bike has potential energy because IT IS AT THE TOP OF A HILL.
The ALL CAPS part of the sentence is the___________ (cause or effect).
What is CAUSE?
What needs to happen for motion to occur?
The applied force needs to be greater than the forces of gravity and friction.
A blue car hits the back of a white car. The white car rolls forward. How do you know there is an energy transfer?
What is...The motion of both vehicles changes?
In a collision between a moving van and a parked car, what happens after the collision?
The motion of the van slows down then stops. The energy transfer of kinetic energy makes the stopped car move a short distance.
Mallory pushed a marble down the slope of the driveway. How did that change the marble's energy?
What is...The applied force to the marble increases its motion, which increases its kinetic energy?
A DEER USES KINETIC ENERGY as a result of running through the woods.
The ALL CAPS part of the sentence is the ___________ (cause or effect).
What is EFFECT?
While playing outside in the snow, Sam pushes Ava down a steep sledding hill. Which of the following BEST explains when the sled gains the most kinetic energy?
a. when Ava gets on the sled
b. when Ava gets off the sled
c. when Sam pushes the sled with his hand
d. when the sled stops at the bottom of the hill
What is...when Sam pushes the sled with his hand?
A drone is flying. Explain two of the three different energy transfers that happen. (think about all the energy that is transferred when a drone is flying)
(1) electrical energy from the drone battery moves to the drone motor.
(2) electrical energy changes into kinetic energy as the drone flies
(3) electrical energy changes into sound energy
In a collision between a van and a stopped car, how do you know there is an energy transfer?
You know there is an energy transfer because the motion of both vehicles changes. The van in motion slows down and the parked car starts to move.