Free Body Diagrams
What does a Free Body Diagram typcially use to represent any object?
A dot
What law states "an object in motion stays in motion, and object at rest stays at rest, unless acted apon by an outside force"
Newtons 1st Law
What does the "a" stand for in F=ma?
Acceleration
What unit do we measure force in?
Newtons
Direction & Magnitude
What law is known as "every action has an equal and opposite reaction"
Newtons 3rd Law
If you double the force but keep the mass the same, what would happen to the acceleration?
It would double
What would be the force of an object sitting on a table?
Fweight & Fnormal
Not accelerating
State all the correct components of Newton's 2nd Law. (3 parts)
F = Force
m = Mass
a = Accelleration
A 10kg cart accelerates at 2 m/s2. What is the net force?
20 N
What is the force that pulls objects towards Earth?
Gravity
A person is standing still in an elevator that is rising upwards. How many force arrows would there be in this free body diagram?
Three. Two up and one down.
The bus you are in slams on its brakes, and you continue to move forward. What law is this most associated with?
Newton's 1st Law (Inertia)
A 60kg student experiences a force of 180 N. What is their acceleration?
3 m/s2
It will remain at a constant speed
A skydiver is falling but has NOT reached terminal velocity yet. Which arrow is bigger, gravity or air resistance at this point.
Gravity, the skydiver is still accelerating downward.
A magician quickly pulls a tablecloth out from under plates and silverware, but why dont the objects all go flying? Name the law, and the term associated with the law.
Objects at rest want to stay at rest. Newton's 1st Law (Inertia)
If a truck driving down the road with a trailer loses its trailer but keeps the same force applied to it, what happens to the acceleration?
It increases
Why is it easier to push something on ice than on most other surfaces?
Ice has very little friction (opposing force)