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100
What is Kinetic Energy
Energy of movement or motion
100
How would you describe a train that is changing its motion?.
A train slowing down to stop at a station
100
If you push on the following objects: refrigerator, desk chair, sofa, and washing machine, which one will move the farthest?
What is a desk chair
100
When a bowling ball hits the pins, the energy from the ball transfers to the pins. This energy transfers changes the pins'___________.
What is speed and direction
100
List three real-life like situations that an engineer could apply the knowledge of friction to.
designing a race track, designing brakes for a truck and designing the bottom of shoes.
200
Two examples of Kinetic energy are
a. Basketball on floor
b. Runners on a track
c. Child kicking a ball
b. Runners on a track
c. A child kicking a ball
200
What are two instruments that are used to measure the speed of a person walking
a metric stick and a stop watch
200
They have a balance force and they will not move
200
A marble collides with a ball that has a mass of 10 grams. the ball moves 3 centimeters. what will happen if the same ball collides with a ball that has a mass of 5 grams?
The 5 gram ball would move farther than the 3 centimeters.
200
We have the following surfaces, cardboard, carpet, ice and sidewalk. Which surface cause the most friction?
The carpet
300
A student swing on a swing at recess is an example of what?
What is objects of Kinetic Energy
300
The object was increasing its speed
300
How will the cart move and is it balanced or unbalanced?
Unbalanced and will move to the right.
300
Any push or pull that causes an object to move, stop, or change the speed or direction is called
A Force
300
We have the following surfaces, cardboard, carpet, ice and sidewalk. If our hypothesis is " If we have a smooth surface, than the car will go farther." Was the hypothesis supported by hr results of the experiment?
It was supported
400
Potential Energy
stored energy or energy at rest
400
Describe the speed of an object
The car traveled 11 Kilometers in 12 minutes.
400
What is the combination of all forces acting on an object called?
What is net forces.
400
When a truck collides with a car, the energy from the truck will transfer to the car. The energy transferred can change the car's _____ and _________.
What is speed and direction.
400
We have the following surfaces, cardboard, carpet, ice and sidewalk. If our hypothesis is " If we have a smooth surface, than the car will go farther." What is the independent variable?
The type of surface
500
A tennis ball bouncing off a court is what state of energy?
What is Kinetic Energy
500
How do you describe speed?
Speed should include units such as kilometers or miles per second/minute/hour.
500
Which is most likely true of an object at rest?
a)It has multiple forces acting on it that add to zero net force.
b)It is being held by a force that opposes motion, such as gravity.
c)It is resting on a smooth surface with no friction.
d)It is experiencing forces that do not sum zero net force.
It has multiple forces acting on it that add to zero net force.
500
A student lifted ball 1 and let it go. They observed that when Ball 1 hit ball 2, only ball 5 moved. What did they observe?
The energy transferred through all the balls to ball 5.
500
Which of the following could cause friction?
a. Sliding a book across a table.
b. Empty box sitting on a flat table.
c. Kids rubbing hands together.
d. a school bus parked.
What is sliding a book across a table and Kids rubbing hands together.
600
What is force is a __________ or _________?
A push or pull
600
What does a force cause?
A force can cause an object to move, stop, change speed, or change direction.
600
How many forces can act on an object?
More than one force can act on an object
600
How does mass affect forces?
The more mass an object has, the greater the force to move it.
600
What is friction?
A force that slows or stops motion when objects rub together