When you hit the pennies in penny hockey, a change in motion occurred. Why is this?
What is energy was transferred between the pennies
100
Define friction
What is a force that slows objects down
100
How could you increase the number of snowmen destroyed by the sled sliding down the hill?
What is increase the starting height, starting KE, or mass of the sled
100
Explain the particle motion of solids, liquids, and gases.
What is solids are packed together and vibrate. Liquids flow and slide faster past each other. Gases move the fastest and spread out much more than liquids do.
100
What is the symbol for the element Helium?
What is He
200
The kinetic energy is measured for two cars before and after they hit each other. The total KE of the cars after the crash is less than the total kinetic energy before the crash. What explains the loss of kinetic energy?
What is some of the cars' KE was converted to heat and sound energy
200
In the matchbox car friction station, which surface had the least amount of friction?
What is the wax paper
200
A sled starts at rest with 51,450 J of potential energy. After traveling part of the way down the slope, the sled has 32,781 J of potential energy. If there is no friction, what is the kinetic energy of the sled?
What is 18669 J
200
Name one chemical property of a substance
What is flammability, explosive, corrosive
200
What is the symbol for the element Iron?
What is Fe
300
In terms of energy, in order to change the acceleration of an baseball, what must happen? Give an example.
What is energy must move in or out of the baseball
300
Name one situation where friction is helpful
Answers will vary
300
Which sled has more potential energy? (hint PE=mgh g=9.8)
Sled A m=100kg h=50m
Sled B m=200kg h= 30m
CALCULATE IT
What is sled B
300
What is Newton's 1st Law of Motion
What is an object in motion tends to stay in motion. An object at rest tends to stay at rest.
300
What is the symbol for the element Boron?
What is B
400
Explain how building implosions work. How does energy transfer and motion occur in building implosions?
Building implosions are when explosives are used to make a building collapse on itself. When the explosives are detonated, KE is transferred from the explosives to the building.
400
Name one situation where friction is hurtful
Answers will vary
400
Sled A: m=100kg v=17 m/s
Sled B: m= 80kg v= 24 m/s
Calculate each momentum (p=m*v) Which sled will win?
What is sled A
400
What is Newton's 2nd Law of Motion
What is force equals mass times acceleration
400
What is the name of the element with the symbol Na?
What is Sodium
500
Look at the picture on the board. Write a CER answering the question. First team with a 5/5 CER gets the points.
See Mr. Krysl
500
Name one reason why friction is so important in NASCAR races? What is one way they improve or reduce friction in your example?
What is it make the breaks work, tires grip the track, lubricates the engine
500
Beginning KE:
Sled A= 13700 J
Sled B=32300 J
Two sleds are about to collide. When they collide, they bounce off each other and no energy is lost. The kinetic energy of sled A is 39,561 J just after the collision. What is the kinetic energy of sled B after the collision? (Note: The potential energy of each sled after the collision is 0 J.)
What is 6439 J
500
What is Newton's 3rd law of motion
What is for every action there is an equal and opposite reaction
500
What is the name of the element with the symbol Hg?