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### 32 Cards in this Set

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 What is Kinematics? the study of motion without regard to the forces that produce it What are Dynamics? the study of motion when forces are considered How did Aristotle (Greek) Classify Motion? Violent and Natural What Idea did Galileo (Italian) come up with? Inertia What is Inertia? the property of objects to maintain their state of motion or an objects ability to resist motion How do we measure Inertia? The amount of material in an object or it's mass How much is 1kg in pounds? 2.2lbs How many Newtons make a kg? 1kg = 9.8 Newtons What is Net Force? The Sum of all the forces acting on an object A vector quantity means that in order to describe it, we need to tell both its size (magnitude) and its direction Example: force, velocity, acceleration a What is a scalar quantity? Example: time, mass, volume a quantity that only needs a magnitude (size) to describe it What is in mechanical equilibrium? Anything that isn't undergoing a change in motion (no net force) In 1543 who stated the earth revolved around the sun? Nicolaus Copernicus Published 3 laws and based his ideas on Galileo's ideas? Sir Issac Newton Newton's 1st law is? Law of Inertia -- An object remains either at rest or in motion due to its inertia. An outside force must act on the object to change the motion and overcome the object’s inertia. Newton's 2nd law is? Acceleration = net force over mass or... The acceleration produced by a net force on an object is directly proportional to the net force, is in the same direction as the net force, and is inversely proportional to the mass of the object What is Terminal Velocity? When an object reaches it's max acceleration Newton's 3rd law is? For Every Action there is an equal and opposite reaction What is the law of conservation of momentum? in the absence of any external force, the momentum of a system remains unchanged Gravitational Force is equal to? Gravitational Force = 1 over distance squard Difference in Pulls on the opposite side of an object can be described as? 1 over distance cubed Acceleration = Force / Mass a Speed = distance / time a Power = work done / time a Work = Force * Distance a Velocity = distance / time a Gravity = force / mass a Ft = (change)mv or force * time interval = change in momentum a KE = 1/2mv^2 a PE = wh a Momentum = mv a wieght = mg a