Galileo questioned whose ideas on falling objects?
What is Aristotle
100
What is an object in when only gravity is pulling it down?
What is free fall
100
How many laws of motion did Newton have?
What is 3
100
What is inertia
What is the tendency of an object to resist being moved or, if the object is moving, to resist a change in speed or direction until an outside force acts upon it
100
When is a force always exerted
What is by one object to another one
200
How did Galileo prove his theory on the mass of the object doesn't effect the time it takes for the object to reach the ground?
What is he dropped two cannibals of different masses from the Leaning Tower of Pisa in Italy
200
What is terminal velocity?
What is the constant velocity of a falling object when the force of air resistance is equal in magnitude and opposite in direction to the force of gravity
200
What is projectile motion
What is the curved path hat an object follows when thrown, launched, or otherwise projected near the surface of the Earth
200
What is the formula for Newton's second law of motion
What is A = F/M -or- F = M x A
200
What does friction do to an object in motion
What is it slows it down
300
What was the outcome of this experiment
What is both cannibals hit the ground at the same time
300
What is air resistance
What is the force that opposes the motion of objects through the air
300
Name 3 examples of projectile motion
What is frog leaping, balls being juggled, a narrow shot by an archer, a swimmer diving in to the water, water being sprayed by a sprinkler..... Etc
300
What is Newton's third law of motion?
What is whenever one object exerts a force on a second object the second object exerts an equal and opposite force on the first
300
What does the word centripetal mean
What is toward the center
400
Why do objects fall to the ground at the same rate?
What is gravity is the same for all objects because acceleration depends on force and mass
400
What is the formula to calculate the change in velocity?
What is delta v = g x t
400
What is the unbalanced force that causes objects to move in a circular motion
What is centripetal force
400
What is Newton's second law of motion
What is the acceleration of an object depends on the mass of the object and the amount of force applied
400
What is horizontal motion
What is motion that is parallel to the ground
500
Why doesn't a heavier object fall faster than a lighter object?
What is the extra mass of the heavy object exactly balances the additional gravitational force
500
What is acceleration?
What is the rate at which velocity changes over time
500
Is a astronaut weightless in space? why or why not?
What is No because weight is a measure if gravitational force and the size of that force depends on the masses of objects and the distances between them. The gravitational force acting on you is very small because the distance between you and the object is very large. But you and the object both have mass. Therefore, gravity would attract you to other objects and so you would still have weight.
500
What is Newtons First Law of Motion
What is an object and rest remains and rest and an object in motion remains in motion at constant speed and in a straight line unless acted upon by an unbalanced force
500
What is vertical motion
What is motion that is perpendicular to the ground