Potential vs Kinetic
Energy
Energy
What is the type of energy that is stored energy?
Potential Energy
Is gravity a contact or non-contact force?
Non-contact force
The part of the experiment that does not change.
The control variables
A ball rolling down a ramp. Contact or non-contact force?
Non-contact force. Gravity is the reason the ball is rolling down the ramp, even though the ball is in contact with the ramp.
If two forces act on an object in the same direction, what do you do?
Add them together
Newton's First law of motions states that an object at rest stays at rest, and an object in motion stays in motion unless acted upon by an unbalanced force. What is another name for Newtons first law of motion?
Inertia
What is the type of energy that is in motion?
Kinetic Energy
Does gravity pull on all objects with the same amount of force?
Yes, all objects with mass pull on all other objects with mass with the same amount of force.
A scientific experiment is done over and over by many people. Everyone get the same result. At this time it can be called a
A scientific theory
Is friction a contact or non-contact force?
Contact
If two forces act on an object in opposite directions, what do you do?
You subtract them
Equation for Newton's 2nd law
F = MA
The total energy in a system is always ___________.
the same.
Which has more of a gravity pull, A bowling ball or a golf ball?
A bowling ball, it has more mass.
Susie wondered if the height of a hole punched in the side of a quart-sized milk carton would affect how far from the container a liquid would spurt when the carton was full of the liquid.
What is the independent variable?
The height of the hole
Wind blowing a sailboat across the water. Is it a contact or a non-contact force?
Contact Force. Wind is made of mass, moving into the sails, causing the boat to move.
5 Newtons are being applied to the right, and 2 newtons are being applied to the left. Will the object move and if so, what is the net force, and in which direction will it move?
The net force is 3 N to the right
Newton's 3rd law of motion states for every action there is an __ __ __ reaction
Equal and opposite
As a boulder rolls down a hill, Potential energy converts to what?
Kinetic Energy
Which has more or a gravitational pull, two objects 2 meters apart, or two objects 1 meter apart?
The objects 1 meter apart.
The closer the objects, the more gravitational pull between them.
Susie wondered if the height of a hole punched in the side of a quart-sized milk carton would affect how far from the container a liquid would spurt when the carton was full of the liquid.
What is the dependent variable?
How far from the container the liquid would spurt.
Name the three non-contact forces
Electric
Magnetism
Gravity
5 Newtons are being applied to the right, and 5 newtons are being applied to the left. Will the object move, and if so, in which direction?
The net force is 0, so no movement will occur
What is the Law of conservation of energy?
A. Energy can't be destroyed, but we can create it.
B. Energy can't be created, but we can destroy it
C. Energy can't be destroyed or created
C.
Which has more gravitational pull?
A. two 3 pound balls 1 meter apart?
b. two 3 pound balls 2 meters apart?
c. Two 10 pound balls 1 meter apart?
C.
The more mass, or the closer the objects, the more gravitational pull there is.
Name all the steps of the scientific method
Problem / Question Observation / research
Hypothesis Experiment
Collect Data Make Conclusion
If you drop a 10 lb bowling ball and a 1 pound pool ball in a vacuum from 100 feet, which object will hit the ground first?
They will hit at the same time.
A soccer player kicks a ball, exerting 50 N of force on it. How much force does the ball exert back on the player’s foot?
50 N of force
In space, a moving object will continue moving forever in the same direction at the same speed unless acted upon by a force. Why?
There is no matter in space, which means no friction.