Show:
Vocabulary
Forces
Friction
Newton's Laws
Miscellaneous
100
A push or pull on an object
What is force
100
The force of gravity acting on an object is its:
What is weight
100
The force of friction will always _____________ the motion between two surfaces. a) be in the same direction of b) oppose c) ease
b) oppose
100
Which of Newton's laws tells us that resting objects stay at rest unless acted on by an outside force?
What is Newton's first law
100
If you decrease the velocity of an object, will the momentum increase or decrease?
Decrease
200
The sum of all the forces acting on an object
What is net force
200
Name the SI unit of force
What is the Newton
200
Without ____________ the tires of a car would not be able to push against the ground and move the car forward.
What friction
200
The equation that sums up Newton's second law:
What is F = M * A
200
If a rolling billiards ball hits a billiards ball at rest, is momentum conserved?
Yes
300
The force that opposes the motion of objects that touch as they pass
What is friction
300
What happens when an unbalanced force acts on an object?
What is the object accelerates
300
If a round object rolls along a flat surface, the friction that occurs is ______________
Rolling friction.
300
According to Newton's second law, this is the only way to double an object's acceleration if you cannot alter its mass.
What is apply double the force
300
What two components affect projectile motion?
Horizontal component = the force that projected the object, and after it is projected, the air resistance that opposes the object. Vertical component = Gravitational acceleration causes the object to accelerate downward.
400
The tendency of an object to resist change in its motion
What is inertia
400
This force keeps objects moving in a circle
What is centripetal force
400
Which type of friction is keeping you from falling out of your chair?
What is static friction
400
Briefly summarize Newton's Third Law
What is for every action there is an equal and opposite reaction. (accept suitable answers)
400
What happens to your weight as you move away from Earth, and why?
What is it decreases because gravity decreases.
500
A type of motion that includes both the force applied and a downward force due to gravity
What is projectile motion
500
The two forces acting on a falling object are_____ and _____.
What is gravity and air resistance
500
This type of friction makes it difficult to push a table across the floor.
What is sliding friction
500
According to Newton's second law, the acceleration of an object equals the net force acting on the object divided by what?
What is its mass
500
The constant velocity of a falling object when the force of air resistance is equal in magnitude and opposite in direction to the force of gravity.
Terminal velocity