Question 1

An Earth satellite in an elliptical orbit has its smallest speed

Accepted Answer

A) closest to Earth. 
B) when getting farther from Earth. 
C) when farthest from Earth. 
D) need more information 
A) closest to Earth. 
B) when getting farther from Earth. 
C) when farthest from Earth. 
D) need more information

Question 2

Dr. Chuck projects a ball horizontally from a lab bench. If the projection speed of the ball were greater, the time in the air would be

Accepted Answer

A) less. 
B) the same. 
C) greater. 
A) less. 
B) the same. 
C) greater.

Question 3

Pioneer 10 was able to escape the solar system by

Accepted Answer

A) having a sufficient escape velocity at launch. 
B) "bouncing off" Jupiter like a tennis ball bouncing off an approaching tennis racket. 
C) refueling via solar cells. 
D) nuclear-powered sustained thrust. 
A) having a sufficient escape velocity at launch. 
B) "bouncing off" Jupiter like a tennis ball bouncing off an approaching tennis racket. 
C) refueling via solar cells. 
D) nuclear-powered sustained thrust.

Question 4

Minimal orbital speed about Earth is about 8 km/s, and about the Moon is

Accepted Answer

A) less than 8 km/s. 
B) more than 8 km/s. 
C) about 8 km/s. 
A) less than 8 km/s. 
B) more than 8 km/s. 
C) about 8 km/s.

Question 5

From Earth, one satellite appears to overtake another. The faster satellite is

Accepted Answer

A) higher. 
B) lower. 
C) smaller. 
D) can't say 
A) higher. 
B) lower. 
C) smaller. 
D) can't say

Question 6

A vertically oriented rocket that is able to sustain a continuous upward velocity of 8 km/s will

Accepted Answer

A) escape from Earth. 
B) be unable to escape Earth. 
C) eventually maintain a fixed orbit around Earth. 
A) escape from Earth. 
B) be unable to escape Earth. 
C) eventually maintain a fixed orbit around Earth.

Question 7

What prevents satellites such as the ISS from falling?

Accepted Answer

A) gravity 
B) centripetal force 
C) centrifugal force 
D) the absence of air drag 
E) nothing 
A) gravity 
B) centripetal force 
C) centrifugal force 
D) the absence of air drag 
E) nothing

Question 8

Project a cannonball from atop Newton's hypothetical mountain at 8 km/s and it orbits Earth. Project it at 9 km/s and the shape of the orbit is

Accepted Answer

A) a somewhat larger circle. 
B) a wide parabola. 
C) an ellipse. 
A) a somewhat larger circle. 
B) a wide parabola. 
C) an ellipse.

Question 9

A ball rolls off the edge of a table at the same time another ball drops vertically from the same table. The ball to hit the floor first is the

Accepted Answer

A) rolling ball. 
B) dropped ball. 
C) both hit at the same time 
A) rolling ball. 
B) dropped ball. 
C) both hit at the same time

Question 10

An astronaut at Earth's surface has a mass of 50 kg and a weight of 500 N. If she were floating freely inside a space habitat in remote space, she would have

Accepted Answer

A) no weight and less mass. 
B) no weight and the same mass. 
C) more weight and no mass. 
D) none of the above 
A) no weight and less mass. 
B) no weight and the same mass. 
C) more weight and no mass. 
D) none of the above

Question 11

An Earth satellite in close orbit circles Earth in about an hour and a half. How long would a satellite located as far away as the Moon take to orbit Earth?

Accepted Answer

A) the same hour and a half 
B) less than an hour and a half 
C) about 28 days 
D) need more information 
E) none of the above 
A) the same hour and a half 
B) less than an hour and a half 
C) about 28 days 
D) need more information 
E) none of the above

Question 12

While a rock thrown upward at 50 degrees to the horizontal rises, neglecting air drag, its horizontal component of velocity

Accepted Answer

A) increases. 
B) remains unchanged. 
C) decreases. 
A) increases. 
B) remains unchanged. 
C) decreases.

Question 13

If a satellite's radial velocity is zero at all times, its orbit must be

Accepted Answer

A) parabolic. 
B) elliptical. 
C) circular. 
D) geosynchronous. 
A) parabolic. 
B) elliptical. 
C) circular. 
D) geosynchronous.

Question 14

A projectile is fired into the air at an angle of 50° above ground level and hits a target downrange. It will also hit the target if fired at an angle of

Accepted Answer

A) 40°. 
B) 45°. 
C) 55°. 
D) 60°. 
E) none of the above 
A) 40°. 
B) 45°. 
C) 55°. 
D) 60°. 
E) none of the above

Question 15

The period of an Earth satellite depends on the satellite's

Accepted Answer

A) mass. 
B) weight on Earth. 
C) radial distance from Earth. 
D) all of the above 
E) none of the above 
A) mass. 
B) weight on Earth. 
C) radial distance from Earth. 
D) all of the above 
E) none of the above

Question 16

It there were no gravity a stone thrown upward at 45 degrees would follow a straight-line path. But because of gravity, at the end of 1 second, the stone is actually

Accepted Answer

A) 5 m below the straight line. 
B) 10 m below the straight line. 
C) 15 m below the straight line. 
A) 5 m below the straight line. 
B) 10 m below the straight line. 
C) 15 m below the straight line.

Question 17

According to Kepler, the line from the Sun to any planet sweeps out equal areas of space

Accepted Answer

A) with each complete revolution. 
B) only when the paths are ellipses. 
C) in equal time intervals. 
A) with each complete revolution. 
B) only when the paths are ellipses. 
C) in equal time intervals.

Question 18

The paths of fragments of fireworks are

Accepted Answer

A) normally straight lines. 
B) parabolas. 
C) different from the paths of projectiles. 
A) normally straight lines. 
B) parabolas. 
C) different from the paths of projectiles.

Question 19

Compared with the period of satellites in close Earth orbit, the period of satellites orbiting far from Earth is

Accepted Answer

A) shorter. 
B) the same. 
C) longer. 
D) need more information 
A) shorter. 
B) the same. 
C) longer. 
D) need more information

Question 20

A hunter on level ground fires a bullet at an angle of 10 degrees below the horizontal while simultaneously dropping another bullet from the level of the rifle. Which bullet will hit the ground first?

Accepted Answer

A) the one dropped 
B) the one fired 
C) both hit at the same time. 
A) the one dropped 
B) the one fired 
C) both hit at the same time.

Exam 10: Projectile and Satellite Motion

An Earth satellite in an elliptical orbit has its smallest speed

Dr. Chuck projects a ball horizontally from a lab bench. If the projection speed of the ball were greater, the time in the air would be

Pioneer 10 was able to escape the solar system by

Minimal orbital speed about Earth is about 8 km/s, and about the Moon is

From Earth, one satellite appears to overtake another. The faster satellite is

A vertically oriented rocket that is able to sustain a continuous upward velocity of 8 km/s will

What prevents satellites such as the ISS from falling?

Project a cannonball from atop Newton's hypothetical mountain at 8 km/s and it orbits Earth. Project it at 9 km/s and the shape of the orbit is

A ball rolls off the edge of a table at the same time another ball drops vertically from the same table. The ball to hit the floor first is the

An astronaut at Earth's surface has a mass of 50 kg and a weight of 500 N. If she were floating freely inside a space habitat in remote space, she would have

An Earth satellite in close orbit circles Earth in about an hour and a half. How long would a satellite located as far away as the Moon take to orbit Earth?

While a rock thrown upward at 50 degrees to the horizontal rises, neglecting air drag, its horizontal component of velocity

If a satellite's radial velocity is zero at all times, its orbit must be

A projectile is fired into the air at an angle of 50° above ground level and hits a target downrange. It will also hit the target if fired at an angle of

The period of an Earth satellite depends on the satellite's

It there were no gravity a stone thrown upward at 45 degrees would follow a straight-line path. But because of gravity, at the end of 1 second, the stone is actually

According to Kepler, the line from the Sun to any planet sweeps out equal areas of space

The paths of fragments of fireworks are

Compared with the period of satellites in close Earth orbit, the period of satellites orbiting far from Earth is

A hunter on level ground fires a bullet at an angle of 10 degrees below the horizontal while simultaneously dropping another bullet from the level of the rifle. Which bullet will hit the ground first?

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