Kinetic Energy
Frank is sitting in a chair not doing his homework.
What kind of energy is he displaying besides laziness?
Potential Energy
If I study and understand the material , Then I will do very well.
What is the independent variale, and dependent variable in this statement
Independent- I study and understand the material
Dependent- I will do well on the assessment.
What are unbalanced forces
One side of the object has more pull or push
on an object than the other side.
Define Mass
The amount of matter in an object
What is motion?
Motion describes and objects direction and speed.
This is a pattern. Tell me which is out of place-
a moving car, Betty sitting on top a sliding board, Messi kicking a ball, a wet leaf lying in the grass, Riona, lsleeping at her desk.
kinetic, potential, kinetic, potential, potential, potential,
so Riona sleepiing at her desk!
What is net force?
A combination of all the forces against an object.
What are balanced forces?
The push and pull on an object are equal.
Define matter
Any material that has mass and takes up space
You are going to buy a new surface for your factory floor. Each box you move musyt go 10 yards on the floor. Since the boxes you use all go the same distance, how far it travels is not a way to measure the friction caused by the floors. What other measurement could you use to determine the amount of friction caused?
Time- How long it takes for each box to travel 10 yards. The surface with the least friction will take less time to travel the distance.
Define potential energy
Energy is not active, stored energy, based on stae or position.
What tools are needed to determine the speed of an object?
A stopwatch and meter stick
Bobo is the boss at work, and training Rufus, the new guy.
There are 2 carts on wheels, one is empty the other is full of packages.
Bobo is tired and he also wants to see how strong the new guy is. Which cart will Bobo tell Rufus to push and why?
Bobo will tell Rufus to push the heavier cart because it will require more force to make it move, and Bobo is tired
A ball is rolled down a ramp and hits a 20 gram marble.
What would your prediction be if the same marble is used and hits a 5 gram ball.
Would the 5 gram ball move more, or less?
It would move more because the marble collided with a smaller object.
In an experiment you are testing four surfaces to see how much fricion they cause on a moving object. How would you know which caused the most?
Measuring the distance travelled by the object on each surface.
Kinetic energy is the energy of __________
Movement
If on a line graph tracking the speed of an animal, the slope on the line starts very high and over time goes down , the speed is _____________
Decreasing
Two carts are on a flat surface and need to be taken to the next building. Cart 1 has 300 grams of mass, and Cart B has 500 grams of mass. They are both pushed with the same amount of force. Which cart will have the greater change in motion and why?
Cart 1 will because it is lighter, so it will go farther
than Cart B because the same amount of force is being used to puush both of them.
Explain how Newton's cradle works. Are only the first ball and last ball affected by the swing. Obviously not.
What word is used to described how the energy was went to ball five? The energy was ____________ through ball 2,3,4, to ball 5
Transferred
You have four surfaces
1. Ice
2. Sandpaper
3. Sidewalk
4. Thick Carpet
Which one would cause the most friction, which the least?
Most - Carpet
Least - Ice
Which of these displays kinetic energy-
A. A bro kicking a ball.
B. A boy riding a swing, moving his legs.
C. A youngster crying for mommy.
D. A bird sitting on top of a poll.
A,B,C
Draw a compass rose
N
W E
S
Three kids are pushing 3 carts using the same force,with the following masses.
A)20 pounds
B) 40 pounds
C)80 pounds Which will have the greatest change in motion
Cart A because it has less mass, and they are pushing with the same amount of force for each cart.
An apple is sitting on the ground, only displaying potential energy. Lucas rolls a baseball at the apple . What will prove that that there is a collision. There is no damage to either object.
The apple will move after it is struck by the baseball and change position.
Define Friction
A force that acts against the motion of an object.