1st Law
Newton's First Law
an object at rest will stay at rest unless acted upon by an unbalanced force. an object in motion will continue to move in the same direction and with the same speed unless acted upon by an unbalanced.
What does a newton measure?
Force
The formula commonly used to explain Newton's Second Law of Motion
F=ma or Force=mass*acceleration
Newtons (N)
Newtons Third Law
For every action there is an equal and opposite reaction.
An object's tendency to resist changes in its velocity
Inertia
A net force of 16 N causes an object to accelerate at of rate of 5 m/s^2. Determine the mass.
3.2 kilograms
The greater the mass of an object the lower the ___
Acceleration
Equal strength forces that are opposite in direction are?
When a force is being exerted onto an object, the object is exerting an equal amount of force in the opposite _________
Direction
why do objects in motion slow down even though no outside force is visible.
Friction
How much force is needed to accelerate a 66 kg skier 1 m/s/s.
66 Newtons
Net force
If a baseball forces a baseball bat to the left, what does the bat do to the baseball?
it forces it to the right
air/water resistance is also known as ___ friction
Fluid (friction)
What is the force of a 1000 kg elevator that is falling freely at 9.8 meters/sec/sec?
9800 Newtons
acceleration is directly proportional to the net force acting on an object and inversely proportional to the object's mass
Newton's Second Law of Motion
When the sum off all balanced forces do not move the object, what is the net force?
Net force=0
When you sit down on a chair, you exert a downwards force on the chair. in return, the chair exerts a _______ force on your body.
upwards
The initial friction when moving an object is called ___ friction
What acceleration will result when a 12 N net force is applied to a 3 kg object?
4 m/s^2 or 4 m/s/s
force and acceleration have magnitude and direction making them..?
Vector quantities
When the sum of all forces acting upon an object do not cancel out and the object moves, what is the net force?
Net force>0 (Greater than Zero)
when forces occur, they occur as _____ and ________ pairs.
equal, opposite