Forces
g= ______N/kg or m/s/s
9.81
What was Newton's first name?
Isaac
Gravity is caused by the _________ of the Earth.
Mass
A free body diagram shows all the ________ acting on an object.
Forces
Normal force acts ________ to the surface the object is resting on.
Perpendicular
Forces have magnitude and direction, so they are ________.
Vectors
How many laws of motion did Newton create?
3
The force of gravity is also called_______.
Weight
Ignoring air resistance, the only force acting on a falling object is ______.
Gravity
The inertia of an object depends on its ________.
Mass
True of False? Mass depends on how strong gravity is.
False
•"A body at rest will remain at rest, and a body in motion will remain in motion unless it is acted upon by an ____________"
External unbalanced force
For an object sitting on a table, the force equal and opposite to gravity is the _______ force.
The normal force
For an object moving at a constant velocity, Net force = _______.
Zero
For a box on an inclined plane, name the 2 components of gravity.
Fg parallel and Fg perpendicular.
In a car, you feel pushed back into your seat when the car _________.
Accelerates
"The net force acting on an object is equal to the ____ of that object times its ________.“
mass times acceleration
As the Earth pulls down on you, you also ___________."
Pull upwards on the Earth
The force of friction depends on the coefficient of friction and the _________.
The normal force.
10N
1 Newton = 1_______
1 kg*m/s^2
"For every action, there is _______________________."
an equal and opposite reaction
Friction acting on a moving object is called _________ friction.
Kinetic
For a box on an inclined plane, the parallel component of gravity = ___________.
m*g*sin(theta)
A 10kg box accelerates to the right at 10m/s/s after an applied force of 200N is applied. What is the magnitude and direction of the friction force?
100N to the left.