Vocabulary
Forces that produce a nonzero net force, which changes an objects motion
Unbalanced Force
The force of attraction between any two objects that depends on the masses of the objects and the distance between them
Gravity
One increases, the other increases
when one decreases, the other decreases
Direct Relationship
What is the force of friction of a10 kg object on a level surface with a coefficient of friction of 0.25?
2.5 N
What is the mass of an object accelerating at 2 m/s/s under a net force of 4N?
2 kg
A push or pull exerted on an object
Force
Forces on an object that do not change the motion of the object
Balanced Force
What is the formula of newton's second law?
∑F=ma
This happens when either of the forces is external to the system being considered
When action and reaction don't cancel each other
What is the preferred motion of the universe?
What is acceleration?
Constant speed in a straight line
Everthing else
The overall force on an object when all the individual forces acting on it are added together
Net Force
A force that resists motion between two surfaces that are in contact
Friction
When a falling object whose air resistance is enough to cancel out it's velocity, putting it in dynamic equilibrium
Terminal velocity
What is the normal force on a 10kg object on a 30 degree incline?
86N
Who was Issac Newton and what does he have to do with Physics?
He organized Physics and calculus and did his best work with gravity and space
A unit of measure that equals the force required to accelerate 1 kilogram of mass at 1 meter per second per second
Newton
Newton's laws of motion were based on thought experiments by
Galileo
Acts on stationary objects, preventing them from moving. Is usually greater than kinetic friction
Static friction
What will be the acceleration of a 10 kg object on a frictionless 30 degree incline?
4.9 m/s/s
What is the definition of Matter?
Takes up volume and has mass
The name often given to the force exerted by the second object back on the first object
Reaction Force
Resistance of an object to a change in its motion
Interia
if at ____, the NET FORCE and ACCELERATION will both be ZERO
Constant velocity
What will be the acceleration of a 10 kg object on a 30 degree incline whose surface has a coeff of friction of 0.25?
2.78 m/s/s
If a 4kg object falls from a height of 5 meters, what is its velocity just as it hits the ground?
9.9 m/s