Physics Dictionary
A quantity that has both magnitude and direction.
What is a vector?
Newton's 1st Law: An object in motion will stay in motion unless acted upon an outside ________.
What is force?
The unit for time.
What is seconds?
An ostrich can run at speeds of up to 25 m/s. It will it take an ostrich this amount of time to run 1600 m at this top speed.
What is 64 seconds?
(mass)(acceleration)
What is the equation for Force?
When any object is launched or thrown into the air and is subject only to the force of gravity (ignore air resistance).
What is projectile motion?
Velocity is the rate of change in ___________ with respect to time.
What is displacement?
The unit for velocity.
What is m/s?
This will be the weight (or Fg) of a person if his mass is 20 kg.
What is 196 N?
F x d cos(the angle between them)
What is the equation for work?
This force opposes the direction of motion of an object.
What is friction force?
Action-Reaction pair: The table exerts an upward force on the book; the book exerts a ________ force on the _________.
What is downward and table?
The unit for momentum.
What is kg m/s?
The momentum of a 1500-kg car moving eastward at 35 m/s.
What is 52,500 kg m/s east?
1/2 mv2
What is KE?
This is the force exerted by a rope, string or chain.
What is tension force?
The amount of momentum that an object has is dependent on two variables: how much stuff is moving and how _________ stuff is __________.
What is fast and moving?
The unit for Force.
What is a Newton?
The kinetic energy of a 0.05-kg golf ball that is hit at 45 m/s.
What is 50.6 J?
1/2kx2
What is Elastic Potential Energy?
A collision in which two colliding objects stick together and move together as one after colliding.
What is a perfectly inelastic collision?
Impulse is equal to _______ times _______.
What is force and time?
The unit for work.
What is a Joule?
The impulse experienced by a 0.2 kg baseball encountering a force of 130 N for 0.50 s.
What is 65 kg m/s?
m1v1i + m2v2i = (m1 + m2) vf
What is perfectly inelastic collision?