Gravity and Keplers Laws Test review

The size of the gravitational force between two objects depends on their ____.

• Frictional Forces

• inertia

• masses and the distance between them

• speed and direction

Tags

NGSS.MS-PS2-4

When calculating the gravitational force between two extended bodies, you should measure the distance

• from the closest points on each body.

• from the most distant points on each body.

• from the center of each body.

• From The center of one object and the edge of the other

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NGSS.HS-PS2-4

Why does an astronaut weigh less on the moon than on Earth?

• The astronaut has less mass on the moon.

• The astronaut is farther from Earth’s center when he or she is on the moon.

• The gravitational field strength is less on the moon’s surface than on Earth’s surface.

• The astronaut is continually in free fall because the moon orbits Earth.

Tags

NGSS.HS-PS2-4

In the absence of air, a penny and a feather that are dropped from the same height at the same time will ____.

• fall at different rates

• fall at the same rate

• float

• have no momentum

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NGSS.MS-PS2-2

NGSS.MS-PS2-4

If gravity did NOT affect the path of a horizontally thrown ball, the ball would ____.

• go straight up

• fall straight down

• follow a curved path

• travel horizontally

Which of the following statements applies to the motion of a ball rising and then falling in free fall?

I. The ball has constant acceleration as it moves upward.

II. The ball has zero acceleration at the very top of its path.

III. The ball has constant acceleration as it moves downward.

• I only

• III only

• I and III

• I, II, and III

Tags

NGSS.MS-PS2-4

Objects that are falling toward Earth in free fall move

• faster and faster

• slower and slower

• at a constant velocity

• slower then faster

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NGSS.MS-PS2-2

NGSS.MS-PS3-1

An object in free fall seems to be ________

• not moving

• slowed by air resistance

• sped up by air resistance

• weightless

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NGSS.MS-PS2-2

In the free-body diagram shown, which of the following is the gravitational force acting on the balloon?

• 5120 N

• 1520 N

• 950 N

• 4050 N

Tags

NGSS.MS-PS2-4

In the figure shown, according to Kepler’s laws of planetary motion,

• A1=A2

• Δt1 > Δt2.

• if Δt1 = Δt2, then the orbit is circular.

• if Δt1 = Δt2, then A1 = A2.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4