Chapter 9 Gravitation

The SI unit of G

• Ncm²/kg²

• Nm²kg²

• Nm²/kg²

• Nkg/m²

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The SI unit of weight

• kg

• N/m²

• N

• N cm/s²

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The relative density of an object is determined comparing its density with that of

• water

• air

• iron

• wood

According to Archimedes principle the upward force experiencing on a body immersed in it will be equal to

• the amount of water displaced

• the volume of water displaced

• the weight of the water displaced

• the area of the object in contact with the water

The amount of matter in an object

• mass
• weight
• inertia
• gravity

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Which of the following is Newton's Law on Gravitation?

• F=Gm₁m₂/r
• F = Gm₁m₂/r²
• F = Gm₁m₂/2r
• F = m₁m₂/2r

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'The orbit of a planet is an ellipse with the Sun at one of the foci" is Kepler's

• First law

• Second law

• Third Law

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The SI unit of mass is

• kg

• g

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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NGSS.HS-PS2-4

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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