Galileo on Motion

Inertia is....

• for every action, there is an equal and opposite reaction
• larger objects take more force to move 
• an object in motion tends to stay in motion unless acted on by an opposite force
• a push that acts in the opposite direction and it slows down.

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This form of motion can only occur in outer space or in a vacuum. It is solely dependent on the force of gravity.

• Free Fall Motion

• Centripetal Motion

• Projectile Motion

• None of the Above

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Acceleration: is the rate of change in ___________.

• speed
• distance
• velocity 
• displacement 

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What happens to the velocity of a ball as it is dropped off a cliff? 

• It decreases at a uniform rate 
• It increases at a uniform rate 
• It is constant 
• It increases at a non-uniform rate

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If you are Galileo answer the ff question:

"Why does a bowling ball and feather hit the ground at different times when dropped from the same height?"

• They don't; they hit the ground at the same time.

• One is more dense than the other.

• One is heavier than the other.

• Air resistance

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The more mass an object has, the faster it will fall.

• True

• False

• Aristotle - TRUE; Galileo - FALSE

• Aristotle - FALSE; Galileo - TRUE

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At the instant a ball is thrown horizontally with a large force, an identical ball is dropped from the same height. Which ball hits the ground first? 

• Neither- they hit at the same time
• the horizontally thrown ball
• the dropped ball
• None of these

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Which would fall with greater acceleration in a vacuum—a leaf or a stone?

• the leaf
• the stone
• They would accelerate at the same rate.
• It is difficult to determine without more information.

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Aristotle proposed that all falling objects _______

• fall at the same speed

• fall at the same acceleration

• fall at the same distance

• fall at the same time

Based from Galileo, force is needed to ___________

• sustain the motion of the object

• change the direction of the object

• change the speed of the object

• oppose the motion of the object

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