Newton's Laws of Motion Flashcards
Who is an English scientist famous for describing physics?
Sir Issac Newton
He did not invent the concepts of motion and gravity
What is Newton’s 1st Law?
An object in motion stays in motion with the same speed and the same direction unless acted upon by an unbalanced force. The same is true for an object at rest.
What is Newton’s 1st Law also know as?
The Law of Inertia
Goes through acceleration and deceleration
What is Newton’s 2nd Law?
The acceleration of an object depends on the net force acting upon the object and the mass of the object.
Force = Mass x Acceleration
Mass and acceleration are inversely related which means as one increases the other decreases
What is Newton’s 2nd Law also known as?
The Law of Acceleration
Acceleration is determined by the size of force and the mass of an object.
What is Newton’s 3rd Law?
For every action, there is an equal and opposite reaction.
Action force and reaction force pairs
What is Newton’s 3rd Law also know as?
The Law of Action/Reaction
The tendency of an object to resist any change in its motion
Inertia
A force that occurs when two objects are in contact and try to slide past each other
Friction
Examples of Newton’s 1st Law
Kicking a soccer ball into a net
Pushing a cart into something
Riding a bike and hitting a tree
Example of Newton’s 2nd Law
A soccer ball was kicked. It had the mass of .42kg and accelerated at 25m/s2. What was the force?
F = Mass X Acceleration
F = .42 X 25 = 10.5 m/s2
Example of Newton’s 2nd Law
An object with a mass of 300kg is observed to accelerate at the rate of 4m/s2. Calculate the total force.
Force = Mass X Acceleration
F = 300 X 4 = 1200 m/s2
What is the property of a moving object resulting from its mass and velocity?
Momentum
How is a rocket able to lift off?
Because the exhaust pushes off the ground lifting it up.
