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F = ma and all that force stuff
Momentum
Vocabulary
Universal Forces
Newton's Laws of Motion
100
kg·m/s^2
What are the units of a Newton? F = ma. The units of mass is the kg. The units of acceleration is m/s^2. Mass times acceleration = kg·m/s^2.
100
kg·m/s
What are the units of momentum?
100
The property of matter that resists changes in motion.
What is inertia?
100
This universal force can either attract or repel.
What is electromagnetic force?
100
Your mother's purse slips off the seat of her car when she comes to an abrupt stop.
What is Newton's 1st Law of Motion? An object at rest stays at rest and an object in motion stays in motion, at the same speed and in the same direction, unless acted upon by an unbalanced force.
200
This type of force is caused by gravity.
What is weight?
200
A massive ball and a small ball are at rest. This is the ball that has the larger momentum.
What is "neither ball has any momentum because the velocity of each ball is zero"?
200
A force that resists motion and always points opposite to the direction of motion (and no, inertia is not a force).
What is friction?
200
This universal force is responsible for holding the protons and neutrons in an atom together.
What is strong nuclear force?
200
You are pulling your little sister in a wagon at a given speed. Your sister's friend gets in the wagon with her so you need to pull with more force in order to get the wagon moving at the same speed as before.
What is Newton's 2nd Law of Motion. The acceleration of an object is directly related to the force acting on the object and indirectly related to the mass of the object.
300
The combination of all the forces acting on an object.
What is net force?
300
A red billiard ball with a speed of 3 m/s strikes a stationary blue billiard ball with the same mass. The red billiard ball stops and the blue billiard ball rolls away. This is the speed of the blue billiard ball after the collision.
What is 3 m/s?
300
The force that causes an object to move in a circle.
What is centripetal force?
300
This universal force increases as mass increases and decreases as the distance between objects becomes greater.
What is gravitational force?
300
A truck backing out of a parking spot bumps into a car parked behind it with a force of 1000 N. The parked car exerts a force of 1000 N back onto the truck.
What is Newton's 3rd Law? For every action there is an equal and opposite reaction.
400
The type of force acting on an object that causes it to speed up, slow down, or start to move if the object is at rest.
What is an unbalanced force?
400
Two billiard balls of equal mass are rolling toward each other with the same speed. This is the total momentum of the system of billiard balls before the balls collide.
What is zero kg·m/s?
400
This is the name of the speed achieved when the weight of a falling object equals the air resistance (drag force) acting on the object.
What is terminal velocity?
400
This universal force is responsible for some radioactive decay.
What is weak nuclear force?
400
A child pushes a ball across the floor. The ball continues to roll across the floor even though the child is not touching it.
What is Newton's 1st Law? An object at rest stays at rest and an object in motion stays in motion, at the same speed and in the same direction, unless acted upon by an unbalanced force.
500
The name for a pair of forces whose sum (net force) is zero and which have no effect on objects that are at rest or are already in motion.
What are balanced forces?
500
A 150 kg defensive lineman running with a speed of 5 m/s collides with and tackles a stationary quarterback whose mass is 100 kg. This is the momentum of the lineman/quarter back combination immediately after the collision.
What is 750 kg·m/s?
500
The path of the motion of a baseball thrown from center field to the catcher. It is caused by the downward force of gravity on the ball and the initial forward velocity of the ball.
What is projectile motion?
500
This force is the weakest of the universal forces but acts over the longest distances.
What is gravitational force?
500
A swimmer jumps on a diving board and is thrown upward by the diving board before diving into the pool.
What is Newton's 3rd Law. For every action there is an equal and opposite reaction.