KE/PE: Live in Concert
Laying Down Newton's Laws
Use the Force, Luke
Graphs and other stuff
(2x points!!)
(2x points!!)
Gravity brings me down
50
What is Potential Energy?
Amount of energy stored in an object
Energy due to an object's position relative to other objects
50
This image represents which of Newton's 3 laws?
The 3rd Law
For every action, there's an equal and opposite reaction
50
What is a force?
A. The ability to do work
B. A change in position
C. A push or pull
D. The energy of movement
C. A push or pull
50
A roller skater rolls at 12 meters per second. How long will it take for the roller skater to roll 72 meters?
A. 4 seconds
B. 5 seconds
C. 6 seconds
D. 7 seconds
C. 6 seconds
12 meters in one second x 6 seconds = 72 meters
50
What is the Universal Law of Gravity?
A. Any two objects that have mass are made of matter and will have resistance to gravity
B. Gravity is neither created nor destroyed, but merely transformed
C. Gravity pulls objects towards the Earth and Normal force pushes up against those objects
D. Any two objects that have mass have a gravitational attraction. Mass and distance are the two main factors
D. Any two objects that have mass have a gravitational attraction. Mass and distance are the two main factors
150
The Law of Conservation of Energy States
A. One may only receive energy from the sun
B. Energy is neither created nor destroyed, but transformed
C. Energy is nonrenewable in most forms
B. Energy is neither created nor destroyed, but transformed
150
This image represents which of Newton's 3 laws?
Newton's 1st Law. An object at rest will remain at rest unless acted on by an outside force. ALSO, an object in motion will keep moving unless acted on by an outside force.
150
Two forces that always affect the motion of an object are _________ and ___________
friction and gravity
150
Ken traveled 3 times and took a break once. Which letter represents the break he took where he didn't go anywhere?
B, his distance did not change
150
Which will produce a STRONGER gravitational attraction?
A. Less mass and close distance
B. Less mass and farther distance
C. More mass and close distance
D. More mass and farther distance
C. More mass and close distance
300
Which example best demonstrates Kinetic Energy?
A. A boat rowing down a river
B. A fully stretched rubber band
C. A car sitting on the side of the highway
D. A leaf hanging from a branch
A. A boat rowing down a river
300
This image represents which of Newton's Laws?
Newton's 2nd Law
Acceleration is proportional to the force produced and inversely proportional to its mass
(f = ma)
300
The person is not moving because the two forces present are balanced. What are the two forces present here?
Gravity and normal force
300
How long did the object remain at a constant speed?
6 seconds
300
Mrs. Glob wants to go to the moon because she will lose weight when she's there. Why?
A. Earth has more friction
B. Mrs. Glob will have less mass on the moon
C. Moon's gravity is not as strong as Earth's
D. Mrs. Glob will be less dense on the moon
C. Moon's gravity is not as strong as Earth's
450
Greg throws a dodgeball straight up. Which statement describes when the ball's KE becomes PE? HINT: Think of the pendulum. When did the object gain the most amount of PE that it could?
A. When the dodgeball reaches its max speed
B. When the dodgeball reaches its max height
C. When Greg throws the dodgeball
D. When the dodgeball rises in the air
B. When the dodgeball reaches its max height
450
A 2,000 lbs. crash test car hits the wall at 45 mph. A 3,000 lbs. crash test car hits the same wall at the same speed as the 2,000 lbs. car.
Which car hit the wall with more force?
The 3,000 lbs. car
Force = mass x acceleration
The more mass, the more force to be produced.
450
Which two options describe a motion that's caused by a contact force?
A. Gravity pulls the leaf down in the fall
B. The magnet pulls the object to itself
C. A sailboat is thrusted across the lake by the wind and water
D. Barry Bonds hit the baseball over the wall for a home run
C. A sailboat is thrusted across the lake by the wind and water
D. Barry Bonds hit the baseball over the wall for a home run
450
What is the difference between speed and velocity?
A. Speed refers to the distance travelled by an object per unit of time and velocity is the distance travelled per second in a specific direction
B. Velocity refers to the distance travelled by an object per unit of time and speed is the distance travelled per second in a specific direction
C. Speed is the amount of movement and velocity is the time
D. Speed is the time it takes for energy transfer and velocity is the direction the energy flows
A. Speed refers to the distance travelled by an object per unit of time and velocity is the distance travelled per second in a specific direction
450
Tom has a taco that weighs 2 lbs. and a taco that weighs 5 lbs. When would a taco's gravitational force on Tom be the strongest?
A. When he stands 1 yard away from the 2 lbs. taco
B. When he stands 5 yards away from the 5 lbs. taco
C. When he stands 5 yards away from the 2 lbs. taco
D. When he stands 1 yard away from the 5 lbs taco
D. When he stands 1 yard away from the 5 lbs taco
600
Right now, the cyclist is at point W. At which point would the cyclist have max PE? Minimum PE?
Max PE: Point W
Min PE: Point Z
600
An advanced tow machine that can tow anything has a choice to tow the two objects in the picture. Which object will be easier to tow/move AND why?
The car because it has less mass --> less inertia --> less resistance to a change in motion
600
This is an example of unbalanced forces. The person on the left is pushing with 74 Newtons. The person on the right is pushing with 66 Newtons. Will the box move TO the left or the right?
The box will move to the right because the person with the greater force is pushing FROM THE LEFT
From left to the right
600
If the soccer player kicks a rolling ball by kicking the ball in the same direction as the ball is traveling (ball is rolling forward, player kicks it forward), how will it affect the ball's speed and direction?
A. The ball’s speed will increase, and it will continue moving in the direction that it was originally traveling.
B. The ball’s speed will decrease, and it will continue moving in the direction that it was originally traveling.
C. The ball’s speed will increase, and it will reverse direction.
D. The ball’s speed will decrease, and it will reverse direction.
A. The ball’s speed will increase, and it will continue moving in the direction that it was originally traveling.
600
How would the force of gravity between Earth and the moon change if the mass of the Earth doubled but Earth stayed the same size?
A. Gravity would decrease, pushing the moon away
B. Earth would lose its pull on the moon and the moon would float away like a balloon
C. Gravity would increase, pulling the moon closer
D. No changes would occur
C. Gravity would increase, pulling the moon closer