1st Law
Newton's 1st Law is also known as the law of __________
Inertia
Newton's 2nd Law is also known as the Law of _________
Acceleration
Newton's 3rd Law is also known as the Law of ________
Action and reaction
What is the difference between contact and non-contact forces?
A contact force is a push or a pull by one object to another that is touching it. A non-contact force is a push or a pull on an object without touching it.
What does Newton's 1st Law of Motion state?
An object at rest will stay at rest and an object in motion will stay in motion unless acted on by an outside, unbalanced force.
What does Newton's 2nd Law of Motion state?
The net force on an object is equal to the mass of the object multiplied by the object's acceleration. (F = ma)
What does Newton's 3rd Law of Motion state?
For every action, there is an equal and opposite reaction.
________ is a contact force that resists the sliding motion between 2 objects.
Friction
What is inertia?
The tendency of an object to resist its change in motion
The greater the force applied, the ____________ the acceleration.
Greater
Does a car or a butterfly exert more force on the other when the butterfly hits and gets squished against the windshield?
According to Newton's 3rd Law, they both exert the SAME amount of force.
The reason the butterfly gets squished while the car barely notices is not because the butterfly experiences a bigger force. It’s because the butterfly has:
________ is a non-contact attractive force between objects that have mass.
Gravity
Brody's ticket to the Jack Johnson concert is at rest in his pocket. According to Newton's 1st Law of Motion, what is the only way to get the concert ticket to move?
According to Newton's First Law of Motion, the concert ticket will stay at rest unless an unbalanced, outside force acts on it.
So the only way to get the ticket to move is for a force to act on it — for example, Brody pulling it out of his pocket or the pocket being moved.
Ashlyn pushes a 10kg desk with a force of 20N. What is the acceleration of the desk?
a = f/m
a= 20N/10kg
a= 2 m/s2
Brennan hits a nail with a hammer. During the collision, there is a force...
a) on the hammer, but not the nail
b) on the nail, but not on the hammer
c) on the nail and also on the hammer
c) on the nail and also on the hammer
The process of changing position is known as ______
Motion
Elyzabeth and Ayla put their 3kg phones in the phone bucket and now the phones are at rest. What is the net force on both of the phones?
0N - any objects at rest have a net force of 0N
Owen and Jackson are fighting over a brand new 4kg JBL speaker. Jackson pulls it with a force of 6N to the left and Owen pulls it with a force of 8N to the right.
What is the acceleration of the speaker?
Net force = F1 + F2
Net force = -6N + 8N
Net force = 2N
a = f/m
a= 2N/4kg
a= 0.5 m/s2
What is the reaction force when a bat applies a 20 N force to a baseball?
The ball applies a 20 N force to the bat in the reverse direction
1) an object speeds up
2) an object slows down
3) an object changes direction