Newtons 1st law
What is Newtons 1st law?
an object at rest stays at rest and an object in motion stays in motion unless acted on by an unbalanced force
What is Newtons 2nd law?
an object with an unbalanced force acting on it will accelerate in the direction of that force
What is Newtons 3rd law?
for every action there is an equal and opposite reaction
What is force?
push or pull of any kind
What is Motion?
a change of position of an object
What is Newtons 1st law considered as...
The law of inertia
What is Newtons 2nd law considered as?
The law of force
What is Newtons 3rd law considered as?
the law of motion
What are the two types of forces?
Balanced and Unbalanced forces
What is speed?
How fast an object changes its position;rate.
What kind(s) of objects have inertia?
all objects with mass
What is the equation for Newton's 2nd law?
F = ma
When a heavy football player and a light one run into each other, who exerts more force?
They are equal
What will cause an object to move?
Unbalanced forces
True or False:
The motion of an object can change over the course of its movement
true
An object in motion will stay in what kind of motion as long as the net forces acting on it are zero?
constant motion in a straight line
The larger the mass you have the _____ force you need to change its motion.
more
Newton's third law states that any action will have a(n) _______ and ______ reaction
Equal and opposite
When forces are _________ the object DOES NOT move.
balanced
The measure of how quickly something moves or the distance it moves in a given amount of time is called
speed
After a cannonball is fired into frictionless space, the amount of force needed to keep it going equals
zero, since no force is requires to keep it moving.
When mass is 10 kg, acceleration is 2 m/s/s, what is force?
20 N
When a cannon fires a cannonball we observe Newton's third law. Which is the reaction force?
The cannon moving backwards
What is the net force of an object that is not moving?
0 N
A wheelchair racer completes a 100 meter course in 20 seconds. What is his speed?
d= 100 m
t= 20 s
5 m/s