Question 1

If Earth's mass doubled with no change in radius, your weight would

Accepted Answer

A)  increase by one-quarter.
B)  double.
C)  be four times as much.
D)  none of the above

Question 2

Dwarf planet Pluto was discovered by perturbations of

Accepted Answer

A)  Jupiter.
B)  Saturn.
C)  Uranus and Neptune.
D)  all of the above

Question 3

A bullet fired from a rifle begins to fall

Accepted Answer

A)  as soon as it leaves the barrel.
B)  after air friction reduces its speed.
C)  neither

Question 4

Traveling from Earth to the Moon requires that a rocket have

Accepted Answer

A)  less than escape speed from Earth.
B)  more than escape speed from Earth.
C)  any sustained speed if time isn't a factor.

Question 5

Minimal orbit speed about Earth is about 8 km/s. Minimal orbital speed about Jupiter would be

Accepted Answer

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

Question 6

Roll a bowling ball off the edge of a table. As it falls, its horizontal component of motion

Accepted Answer

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

Question 7

A bullet fired horizontally hits the ground in 0.5 s. If it had been fired with twice the velocity it would have hit the ground in

Accepted Answer

A)  less than 0.5 s.
B)  more than 0.5 s.
C)  0.5 s.

Question 8

The speeds of the planets about the Sun depend on

Accepted Answer

A)  their distances from the Sun.
B)  the masses of the planets.
C)  both
D)  neither

Question 9

A projectile is fired horizontally. With no air resistance it maintains its horizontal component of velocity because

Accepted Answer

A)  no forces act on it.
B)  no horizontal forces act on it.
C)  of no initial vertical component of velocity.
D)  all of the above
E)  none of the above

Question 10

A lunar month is about 28 days. If the Moon were farther from Earth than it is now, the lunar month would be

Accepted Answer

A)  more than 28 days.
B)  less than 28 days.
C)  about 28 days.

Question 11

A ball player wishes to determine pitching speed by throwing a ball horizontally from an elevation of 5 m above the ground. The player sees the ball land 20 m down range. What is the player's pitching speed?

Accepted Answer

A)  5 m/s
B)  10 m/s
C)  20 m/s
D)  25 m/s
E)  none of the above

Question 12

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

Accepted Answer

A)  longer.
B)  shorter.
C)  the same.
D)  not enough information

Question 13

A stone is thrown horizontally from the top of a cliff. One second after leaving your hand it drops a vertical distance of

Accepted Answer

A)  5 m.
B)  10 m.
C)  15 m.

Question 14

A projectile is launched straight upward at 50 m/s. If air resistance is negligible, its speed upon returning to its starting point is

Accepted Answer

A)  less than 50 m/s.
B)  50 m/s.
C)  more than 50 m/s.

Exam 4: Gravity, Projectiles, and Satellites

A bullet fired horizontally hits the ground in 0.5 s. If it had been fired with twice the velocity it would have hit the ground in

Correct Answer
verified

Roll a bowling ball off the edge of a table. As it falls, its horizontal component of motion

Correct Answer
verified

A stone is thrown horizontally from the top of a cliff. One second after leaving your hand it drops a vertical distance of

Correct Answer
verified

If Earth's mass doubled with no change in radius, your weight would

Correct Answer
verified

A ball player wishes to determine pitching speed by throwing a ball horizontally from an elevation of 5 m above the ground. The player sees the ball land 20 m down range. What is the player's pitching speed?

Correct Answer
verified

The speeds of the planets about the Sun depend on

Correct Answer
verified

Minimal orbit speed about Earth is about 8 km/s. Minimal orbital speed about Jupiter would be

Correct Answer
verified

A lunar month is about 28 days. If the Moon were farther from Earth than it is now, the lunar month would be

Correct Answer
verified

Dwarf planet Pluto was discovered by perturbations of

Correct Answer
verified

A projectile is launched straight upward at 50 m/s. If air resistance is negligible, its speed upon returning to its starting point is

Correct Answer
verified

A projectile is fired horizontally. With no air resistance it maintains its horizontal component of velocity because

Correct Answer
verified

Traveling from Earth to the Moon requires that a rocket have

Correct Answer
verified

A bullet fired from a rifle begins to fall

Correct Answer
verified

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

Correct Answer
verified

Exam 4: Gravity, Projectiles, and Satellites

A bullet fired horizontally hits the ground in 0.5 s. If it had been fired with twice the velocity it would have hit the ground in

Correct AnswerverifiedShow Answer

Roll a bowling ball off the edge of a table. As it falls, its horizontal component of motion

Correct AnswerverifiedShow Answer

A stone is thrown horizontally from the top of a cliff. One second after leaving your hand it drops a vertical distance of

Correct AnswerverifiedShow Answer

If Earth's mass doubled with no change in radius, your weight would

Correct AnswerverifiedShow Answer

A ball player wishes to determine pitching speed by throwing a ball horizontally from an elevation of 5 m above the ground. The player sees the ball land 20 m down range. What is the player's pitching speed?

Correct AnswerverifiedShow Answer

The speeds of the planets about the Sun depend on

Correct AnswerverifiedShow Answer

Minimal orbit speed about Earth is about 8 km/s. Minimal orbital speed about Jupiter would be

Correct AnswerverifiedShow Answer

A lunar month is about 28 days. If the Moon were farther from Earth than it is now, the lunar month would be

Correct AnswerverifiedShow Answer

Dwarf planet Pluto was discovered by perturbations of

Correct AnswerverifiedShow Answer

A projectile is launched straight upward at 50 m/s. If air resistance is negligible, its speed upon returning to its starting point is

Correct AnswerverifiedShow Answer

A projectile is fired horizontally. With no air resistance it maintains its horizontal component of velocity because

Correct AnswerverifiedShow Answer

Traveling from Earth to the Moon requires that a rocket have

Correct AnswerverifiedShow Answer

A bullet fired from a rifle begins to fall

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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