Which scientist proposed the three laws of motion?
100
Electric and magnetic forces
What are the only two forces that can both attract and repel?
100
Centripetal Force.
What center-seeking force acts on objects that are rotating?
200
The Newton
What is the SI unit for force?
200
Air resistance
What reduces the acceleration of a falling object?
200
Momentum = Mass times Velocity
What is the equation for momentum?
200
Magnetic, Electric, Strong Nuclear, Weak Nuclear, and Gravitational.
Name two types of universal forces.
200
The center of the Earth
The Earth's gravity acts in which direction?
300
Net Force
What is the sum of all forces acting on an object?
300
Sliding friction
What type of friction was present between the straw and the string in the lab?
300
10,000 kg x m/s
What is the momentum of a 1000 kg elephant that is running at 10 m/s?
300
The Earth and moon
What two bodies are primarily responsible for the Earth's tides?
300
The object accelerates.
What happens when an unbalanced force acts on an object?
400
Zero
When the forces on an object are balanced, the net force is what?
400
Reaction force
For every action force, there is what?
400
Galileo
Who concluded that objects not subjected to friction would continue moving indefinately?
400
The Law of Universal Gravitation
Which of Newton's laws states that every object is attracted to every other object?
400
Strong and weak nuclear forces
What two forces hold an atom's nucleus together?
500
Static, Sliding, Rolling, and Fluid
What are the 4 types of friction?
500
Momentum
Which is not a force: Gravity, Friction, Weight, or Momentum?
500
Aristotle
Which scientist incorrectly proposed that force is required to keep an object moving at a constant speed and thus held back the study of motion for almost 2000 years?
500
100 times
Strong nuclear forces are how many times stronger than the repulsive (electrical) forces between protons?
500
Static, sliding, rolling
What is the correct order from strongest to weakest of the following types of frictional forces: Rolling Friction, Sliding Friction, and Static Friction. --Know this one--