Newton's Laws
Non-Contact Forces
Potential Energy
Forces 101
Random stuff
100
Unbalanced forces cause a change in _____________?
Acceleration
100
How can you decrease the gravitational potential energy on an object? Name 2 ways.
Lower the mass and lower the height
100
What type of energy occurs when the bonds between atoms occurs?
Chemical
100
True or false: An object at rest means there are no forces acting on it.
False. Normal force and gravity are two forces acting on it.
100
Marvin is floating into space. Does his mass or weight change?
Weight--depends on gravity.
200
The tendency of an object to resist a change in its motion is known as:
Intertia
200
Does a plane flying in the sky have potential energy or kinetic energy?
Both
200
On a trampoline, when would you see the most elastic potential energy?
When you are at the lowest part of your jump and the trampoline is stretched.
200
If a plane is moving with 430 N west and the wind is blowing 25 N east, what is the total net force acting on the plane?
The plane has a net force of 405 N to the west
200
True or false: Space has gravity
True--just less than what we are used to
300
If you hit a nail with a hammer what two contact force(s) occur?
A force from the hammer to the nail and a force from the nail to the hammer (equal and opposite reactions)
300
True or false: An object cannot regain its potential energy once it has been transformed into kinetic
False
300
Where would a roller coaster have the most potential energy?
At the top of the biggest hill
300
Draw a speed vs time graph for an object slowing down at a constant rate
A straight line heading down and to the right (negative slope)
300
An electromagnet is often better than a permanent magnet because it can:
Turn off
400
Identify 2 ways you can reduce an object's acceleration using Newton's 2nd law.
Reducing applied force or increasing mass
400
Name a way where two magnets would have a lot of potential energy. Be specific!
Placing two like poles close together or spreading out two opposite poles.
400
Combustion is often seen with what type of potential energy?
Chemical (transformed into heat/light/sound)
400
Draw a force diagram (the one with arrows) for a sled sliding down a hill.
Answer will be on board
400
A conductor loses or gains _____________ easily.
Electrons
500
Which one of Newton's laws best explains how a rocket takes off into space?
3rd. The action force was the air escaping and hitting air. The reaction was the air pushing back therefore getting the car to move.
500
How are gravitational, electrical, and magnetic forces similar?
The force gets stronger the closer you are to the source
500
Where is the magnetic field around a magnet the strongest?
At the poles
500
Identify the 3 types of friction
Fluid friction, static friction, and sliding friction
500
What two factors impact an object's momentum?
Mass and velocity
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