Question 1

When Kepler devised his laws of planetary motion, he was most influenced by

Accepted Answer

A) Galileo. 
B) Newton. 
C) Tycho Brahe. 
A) Galileo. 
B) Newton. 
C) Tycho Brahe. C

Question 2

When the potential energy of a satellite decreases

Accepted Answer

A) kinetic energy also decreases. 
B) its kinetic energy correspondingly increases. 
C) its distance from the orbiting body increases. 
D) none of the above 
A) kinetic energy also decreases. 
B) its kinetic energy correspondingly increases. 
C) its distance from the orbiting body increases. 
D) none of the above B

Question 3

The force of gravity does work on a satellite when it is in

Accepted Answer

A) circular orbit. 
B) elliptical orbit. 
C) both of these 
D) neither of these 
A) circular orbit. 
B) elliptical orbit. 
C) both of these 
D) neither of these B

Question 4

The orbital path of a satellite has two focal points. When both focal points are together

Accepted Answer

A) the satellite path is an ellipse. 
B) the satellite path is a circle. 
C) satellites lose speed. 
A) the satellite path is an ellipse. 
B) the satellite path is a circle. 
C) satellites lose speed.

Question 5

Which of these vary for satellites in elliptical orbits?

Accepted Answer

A) speed. 
B) momentum. 
C) kinetic energy. 
D) all of the above 
E) none of the above 
A) speed. 
B) momentum. 
C) kinetic energy. 
D) all of the above 
E) none of the above

Question 6

If you throw a stone horizontally from the top of a cliff, one second after leaving your hand its vertical distance below the top of the cliff is

Accepted Answer

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

Question 7

As soon as a ball rolls off the edge of a table

Accepted Answer

A) it is not acted on by any forces. 
B) it is not acted on by any horizontal forces. 
C) has a zero net force acting on it. 
D) none of the above 
A) it is not acted on by any forces. 
B) it is not acted on by any horizontal forces. 
C) has a zero net force acting on it. 
D) none of the above

Question 8

A bullet fired horizontally over level ground hits the ground in 0.5 second. If it had been fired with twice the speed it would have hit the ground in

Accepted Answer

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

Question 9

The focal point of a satellite in orbit about the Sun is

Accepted Answer

A) inside the Sun. 
B) outside the Sun. 
C) both of these 
D) neither of these 
A) inside the Sun. 
B) outside the Sun. 
C) both of these 
D) neither of these

Question 10

Who envisioned the motion of planets as projectiles obeying the laws of physics?

Accepted Answer

A) Kepler 
B) Newton 
C) both of these 
D) neither of these 
A) Kepler 
B) Newton 
C) both of these 
D) neither of these

Question 11

A ball is tossed upward. Neglecting air drag, the acceleration along its path is

Accepted Answer

A) 0 g. 
B) g downward. 
C) g upward. 
D) g upward, then g downward. 
E) none of the above 
A) 0 g. 
B) g downward. 
C) g upward. 
D) g upward, then g downward. 
E) none of the above

Question 12

For all paths of Earth satellites, one focus of the path is

Accepted Answer

A) the location from which the satellite was launched. 
B) Earth's center. 
C) the Sun's center. 
D) need more information 
A) the location from which the satellite was launched. 
B) Earth's center. 
C) the Sun's center. 
D) need more information

Question 13

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) their periods of rotation. 
D) none of the above 
A) their distances from the Sun. 
B) the masses of the planets. 
C) their periods of rotation. 
D) none of the above

Question 14

Rockets that launch satellites into orbit need less thrust when fired from

Accepted Answer

A) Cape Canaveral in Florida. 
B) Edwards Air Force Base in California. 
C) Hawaii. 
D) location does not affect the required rocket thrust. 
A) Cape Canaveral in Florida. 
B) Edwards Air Force Base in California. 
C) Hawaii. 
D) location does not affect the required rocket thrust.

Question 15

As soon as a bowling ball rolls off the edge of a table its horizontal component of velocity

Accepted Answer

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

Question 16

Escape speed from the Sun is

Accepted Answer

A) about the same as from Earth. 
B) very much greater than for Earth. 
C) indefinite. 
A) about the same as from Earth. 
B) very much greater than for Earth. 
C) indefinite.

Question 17

Acceleration is greater for a satellite when it is at the

Accepted Answer

A) apogee (farthest point). 
B) perigee (closest point). 
C) zenith. 
D) same acceleration at all of the above places. 
A) apogee (farthest point). 
B) perigee (closest point). 
C) zenith. 
D) same acceleration at all of the above places.

Question 18

Dr. Chuck projects a ball horizontally from a lab bench. The ball lands on a bullseye marked on the floor a horizontal distance equal to the ball's initial speed

Accepted Answer

A) multiplied by its time in the air. 
B) coupled with its speed of fall. 
C) squared plus its downward speed squared when hitting the floor. 
D) all of the above 
E) none of the above 
A) multiplied by its time in the air. 
B) coupled with its speed of fall. 
C) squared plus its downward speed squared when hitting the floor. 
D) all of the above 
E) none of the above

Question 19

An Earth satellite is simply a projectile

Accepted Answer

A) freely falling around Earth. 
B) floating motionless in space near Earth. 
C) approaching Earth from outer space. 
A) freely falling around Earth. 
B) floating motionless in space near Earth. 
C) approaching Earth from outer space.

Question 20

Escape speed from Mars is

Accepted Answer

A) about the same as from Earth. 
B) greater than from Earth. 
C) less than from Earth. 
A) about the same as from Earth. 
B) greater than from Earth. 
C) less than from Earth.

Exam 10: Projectile and Satellite Motion

When Kepler devised his laws of planetary motion, he was most influenced by

When the potential energy of a satellite decreases

The force of gravity does work on a satellite when it is in

The orbital path of a satellite has two focal points. When both focal points are together

Which of these vary for satellites in elliptical orbits?

If you throw a stone horizontally from the top of a cliff, one second after leaving your hand its vertical distance below the top of the cliff is

As soon as a ball rolls off the edge of a table

A bullet fired horizontally over level ground hits the ground in 0.5 second. If it had been fired with twice the speed it would have hit the ground in

The focal point of a satellite in orbit about the Sun is

Who envisioned the motion of planets as projectiles obeying the laws of physics?

A ball is tossed upward. Neglecting air drag, the acceleration along its path is

For all paths of Earth satellites, one focus of the path is

The speeds of the planets about the Sun depend on

Rockets that launch satellites into orbit need less thrust when fired from

As soon as a bowling ball rolls off the edge of a table its horizontal component of velocity

Escape speed from the Sun is

Acceleration is greater for a satellite when it is at the

Dr. Chuck projects a ball horizontally from a lab bench. The ball lands on a bullseye marked on the floor a horizontal distance equal to the ball's initial speed

An Earth satellite is simply a projectile

Escape speed from Mars is

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