Laws of Motion
An object in motion stays in motion unless an unbalanced force acts upon it.
1st Law of Motion
Which will accelerate faster, a 4,000 kg pickup truck or a 475 kg fiat?
4,000 kg pickup truck
This is the state of an object when not in motion.
At rest
Two students are pushing a puzzle box on a desk. Each student is pushing with 25 N of force. What is the net force?
0 Newtons
This is Mrs. Barron's favorite color.
Purple
What is the 2nd Law of Motion?
F=ma
An object will always do this when acted upon by an unbalanced force.
Accelerate
This is the force on an object when it is not in motion.
Balanced forces
Suzie >5 N and Ozzie <10 N. What is the net force? Don't forget DIRECTION!
<5 N
This is Mrs. Barron's favorite food.
Cheese pizza
For every action, there is an equal and opposite reaction.
3rd Law of Motion
This is a change in velocity (speed, direction or both).
Acceleration
This is a straight path an object can move along.
Direction
You're releasing your marble on the roller coaster track. Your partner accidentally kicks the marble and it goes off the track. What happens to the marble?
The speed of the marble would increase and the direction would change.
Two examples of the animals I see on my walks with Mr. Barron.
Deer, birds, turtles, snakes, frogs, squirrels, rabbits, fish.
The laws of motion are named after this person.
Sir Isaac Newton
This is a system that uses a background object to establish position of an object.
Frame of reference
This is the sum of all forces acting on an object.
Net force
This is the difference between speed and velocity.
Velocity = speed and direction
Speed = no specific direction
Mr. Barron does not like this kind of critter.
Spiders
This law is used interchangeably with the 1st Law of Motion.
Inertia
This thing can save lives in an accident.
Seatbelts
This is the equation for speed.
s=d/t
A Toyota Carola has a mass of 200 kg. It's acceleration up the on ramp is 0.5 m/s2. What is the net force?
F = ma
F = 200 x 0.5
F = 100 N
This is the name of the park CPCA adopted.
Janet Bartle's Park