4.1 Introduction to Gravity Quiz

What are the three NON-CONTACT forces were mentioned in this unit?

• Gravity, friction, air resistance

• Forces, motion, human body systems

• Friction, electrostatic, muscular system

• Gravity, electrostatic, and magnetism

What states that "every object in the universe attracts every other object"?

• Law of Universal Gravitation
• Newton's First Law of Motion
• My mother
• Inertia & gravity

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The three examples pictured are of

• Non-contact Forces

• Contact Forces

Two factors effecting the magnitude of the force of gravity between 2 objects are...

• mass and distance 
• mass and matter
• distance and weight 
• weight and mass

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Force of gravity is directly proportional to

• Mass
• Weight
• Distance
• Time

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If I double the distance between two objects, what happens to their gravitational Force?

• 4x bigger
• 4x smaller
• 2x bigger
• 2x smaller

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If I double the mass of one object, but don't change anything else... WHat happens to the gravitational force between two objects?

• Doubles
• Quadruples
• Cut in Half
• 4x Smaller

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What happens to Gravitational force if I double both of the masses but don't change their distance?

• doubles
• half as big
• 4x bigger
• 4x smaller

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Two asteroids exert a gravitational force, F, on each other. Some time later, the asteroids are now three times as far from each other as before. Which of the following represents the gravitational force at this distance? 

• F/3
• F/2
• F/6
• F/9

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Two objects are attracted to each other with 36 N of gravitational force.
What would the force between them be if the distance between them were doubled?

• 9
• 18
• 72
• 144

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