Newtons Laws
Name the Law:
"There is an equal and opposite reaction for every action in physics"
3rd Law of Motion
What is the measure of an object's speed and direction?
velocity
Name 3 different materials that will reduce friction
Oil, water, lotion, grease, wax...
How do you calculate average speed?
Total distance / total time
What did Bill Nye use to demonstrate how a round shape rolls easily with less friction?
(Hint - bowling)
He used a square bowling ball
"The Law of Inertia" is another name for which of Newton's Laws?
1st Law of Motion - an object in motion stays in motion, an object at rest stays at rest unless acted upon by an outside force
What is a Newton?
The standard metric unit for measuring force or weight
The force that resists movement in an object at rest is...
static friction
Gus drove for 8 hours and traveled 704 miles. What was his average speed?
88 mph
When is our last day of school?
June 7
Give an example of Newton's 2nd Law
___
Motion that continues endlessly is...
perpetual motion
Friction generates _____________.
heat
What is the momentum of a 5-kilogram dog running at 12 feet-per-second?
60 kg-ft/s2
What is the story for how Isaac Newton came up with the idea of gravity?
He was sitting under an apple tree and an apple fell on his head
Which of Newton's Laws is this an example of?
A ball will continue rolling down the parking lot until it hits the building and stops
1st Law of Motion
What is inertia?
The resistance to a change in motion
Give an example of a situation in which you want to increase friction.
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Harvey drove 60 miles at a speed of 25 miles per hour. How long did it take him?
2.4 hours
2 hours 24 minutes
Name 2 "invisible forces" that are always acting on us
Friction, gravity, air resistance...
Which of Newton's Laws is this an example of?
It takes more force to move a bowling ball than a ping pong ball.
2nd Law of Motion
What is a force?
A push or pull on an object
The force that resists the motion of a moving object is...
kinetic friction
What is the acceleration needed to push a 50-kg cabinet with a force of 200 N?
4
a = f/m
What is the Law of Conservation of Momentum?
Momentum is never created or destroyed - it is transfered from one object to another during a collision