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A description of how far it is from one point to another.


Distance


If gravity acts to pull an object down a hill, this acts to push it up.


Friction


The resistance to the change in motion by an object.


Inertia


A measure of the pulling force of gravity.


Weight


The SI unit for distance.


Meter


F = m x aThis is:


Newton’s Second Law of Motion


Also known as The Law of Inertia


Newton’s First Law of Motion


kg.m/s/s


A Newton (N)


The rate of change in velocity


acceleration


Acceleration due to gravity on the surface of the Earth


9.8 m/s/s or m/s2


What is the weight of an object with a mass of 1 kilogram?


F = ?m = 1 kga = 9.8 m/s/s

F = m x a

F = (1 kg)(9.8 m/s/s)

F = 9.8 N


Acceleration, deceleration and a change in direction all can be caused when the net force is greater than ___


zero newtons (0 N)


As a box is sliding down a ramp, a 10 newton force of gravity is pulling the box down while a 2 newton force of friction acts to stop the box. What is the net force accelerating the box down the ramp?


10 N – 2 N = 8 N


A tow truck pulls a 2000 kg with a netforce of 4000 N.What is the acceleration of the car?


a = F ÷ m m = 2000 kg F = 4000 N4000 N ÷ 2000 kga =2 m/s/sor m/s2


Jumping on a trampoline is an example which Law of Motion.


Newton’s Third Law of Motion


A pencil sitting on a desk (not moving) is an example.


Newton’s 1st Law


The SI unit of Force


The Newton


Determines how much inertia an object has


The mass of the object.


A person flies through the windshield of the car because she did not have their seatbelt on. This is an example of


Newton’s First Law of Motion


What is the SI unit of Mass?


kilograms


If you go to the moon, what happens to your mass


It does not change.


The amount of matter in an object


Mass


If you drop a penny, an elephant, and a puppy at the same time from the same height, which would hit the ground first (ignoring air resistance)?


They would all hit at the same time.


Two factors in determining the amount of gravity between two objects.


The mass and the distance between the two objects


This is what happens to your weight and mass when you go to the moon.


Weight decreases, mass remains the same.


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