Motion Terms
This term describes an object's location.
What is position?
A marker resting on a table
Normal force (or force of the table) up, and weight down. Arrows are equal length.
What is the weight of a 3-kg textbook?
30 N
The quantity of matter in an object
What is mass?
What is the momentum of a 6-kg bowling ball moving at 3m/s in the positive direction?
18 kg*m/s
This term describes the rate at which an object's position changes.
What is velocity?
A marble rolling freely across the floor at constant velocity
Normal force (or force of the floor) up and weight down. Arrows are equal length. Any horizontal forces must be balanced.
A person weighs 760 N on Earth. What is their mass?
76 kg
A push or a pull
What is a force?
What is the momentum of a 500-g bird flying in the negative direction at 2 m/s?
-1 kg*m/s
This term describes the rate at which an object's velocity changes.
What is acceleration?
An apple falling from a tree.
Weight down. Optional: air resistance up (arrow must be much shorter than the weight arrow)
What is the weight of a 50-g marble tossed in the air?
0.5 N
The law which describes the connection between force and motion
What is Newton's 2nd Law?
What is the total momentum of a marble moving left at 4 m/s and an identical marble moving right at 4 m/s?
0 kg*m/s
The units of this quantity used to describe motion are meters per second per second.
What is acceleration?
A piece of tissue paper blowing in the wind
Air resistance (or drag) in any direction and weight down. Only one force associated with air.
Dr. Douglas has a mass of 75 kg. With what force, and in what direction, does HIS body pull on the EARTH?
750 N upward
This term is used to identify any quantity that does not change with time.
What is a conserved quantity?
Write an algebraic expression for the conservation of momentum of a system of two objects.
(m1v1 + m2v2)i = (m1v1 + m2v2)f
This quantity is equal to an object's velocity multiplied by a time interval.
What is displacement? (or change in position, or Δx)
The Moon
Weight toward the Earth (optionally, another weight toward the Sun. Sun-Moon arrow is longer)
Is there gravity in space?
Yes
The term for "g" that Dr. Douglas insists everyone use
What is the gravitational constant? (NOT GRAVITY!)
A firework launched into the air reaches its highest point, and explodes. What is the total momentum of all the fragments of the exploded firework right after it explodes?
0 kg*m/s