Question 1

A dropped ball gains speed because

Accepted Answer

A) its velocity changes. 
B) a gravitational force acts on it. 
C) of inertia. 
D) its nature is to become closer to Earth. 
A) its velocity changes. 
B) a gravitational force acts on it. 
C) of inertia. 
D) its nature is to become closer to Earth.

Question 2

Consider two planets in space that gravitationally attract each other.If the mass of one planet is doubled,and the distance between them doesn't change,then the force between them is

Accepted Answer

A) one-quarter. 
B) half as much. 
C) twice as much. 
D) four times as much. 
E) none of the above 
A) one-quarter. 
B) half as much. 
C) twice as much. 
D) four times as much. 
E) none of the above

Question 3

Newton discovered

Accepted Answer

A) gravity. 
B) that gravity is universal. 
C) neither of these 
A) gravity. 
B) that gravity is universal. 
C) neither of these

Question 4

As a bowling ball that rolls off the edge of a table falls,its horizontal component of motion

Accepted Answer

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

Question 5

Strictly speaking,when you step off a curb you are momentarily

Accepted Answer

A) in orbit. 
B) weightless. 
C) in space. 
A) in orbit. 
B) weightless. 
C) in space.

Question 6

If there were no gravity,a cannonball fired upward at 45° would follow a straight-line path.Due to gravity,however,at the end of 3 s it is

Accepted Answer

A) 5 m below the straight line. 
B) 10 m below the straight line. 
C) 15 m below the straight line. 
D) 20 m below the straight line. 
E) more than 20 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. 
D) 20 m below the straight line. 
E) more than 20 m below the straight line.

Question 7

How is stepping off a curb similar to taking a ride aboard an orbiting space vehicle?

Accepted Answer

In both instances you experience weightl

Question 8

Ignoring air resistance,what maximum speed can be given to a horizontally moving tennis ball as it clears the net 1.25 m high to remain within the edge of the court,which is 12.0 m from the bottom of the net?

Accepted Answer

A) 12.0 m/s 
B) 16.0 m/s 
C) 24.0 m/s 
D) 48.0 m/s 
A) 12.0 m/s 
B) 16.0 m/s 
C) 24.0 m/s 
D) 48.0 m/s

Question 9

The planet Neptune was discovered by perturbations of

Accepted Answer

A) Uranus. 
B) its moons. 
C) Pluto. 
D) none of the above 
A) Uranus. 
B) its moons. 
C) Pluto. 
D) none of the above

Question 10

Weight can be simulated in a space vehicle if the vehicle is

Accepted Answer

A) falling. 
B) in a circular orbit about Earth. 
C) rotating. 
D) none of the above 
A) falling. 
B) in a circular orbit about Earth. 
C) rotating. 
D) none of the above

Question 11

Your weight is defined to be the force

Accepted Answer

A) due to gravity only. 
B) you exert against a supporting surface. 
C) equal to your normal force on any surface. 
A) due to gravity only. 
B) you exert against a supporting surface. 
C) equal to your normal force on any surface.

Question 12

With no air resistance,a projectile fired at 50° has the same range as if it were fired at

Accepted Answer

A) 40°. 
B) 45°. 
C) 55°. 
D) 60°. 
A) 40°. 
B) 45°. 
C) 55°. 
D) 60°.

Question 13

A very massive object A and a less massive object B move toward each other under the influence of gravity.Which force,if either,is greater?

Accepted Answer

A) the force on A 
B) the force on B 
C) both forces on each other are the same 
A) the force on A 
B) the force on B 
C) both forces on each other are the same

Question 14

At some point between Earth and the Moon,the forces due to gravity on a space traveler would be the same when this point is

Accepted Answer

A) nearer Earth. 
B) nearer the Moon. 
C) mid-way between Earth and the Moon. 
D) none of the above 
A) nearer Earth. 
B) nearer the Moon. 
C) mid-way between Earth and the Moon. 
D) none of the above

Question 15

According to Newton,the greater the masses of interacting objects,the

Accepted Answer

A) less the gravitational force between them. 
B) greater the gravitational force between them. 
C) greater the force between them by the square of the masses. 
D) greater the force between them by the square of the distance. 
A) less the gravitational force between them. 
B) greater the gravitational force between them. 
C) greater the force between them by the square of the masses. 
D) greater the force between them by the square of the distance.

Question 16

If a projectile is fired straight up at a speed of 10 m/s,neglecting air resistance,the time it takes to reach the top of its path is

Accepted Answer

A) 1 s. 
B) 2 s. 
C) 10 s. 
D) not enough information 
A) 1 s. 
B) 2 s. 
C) 10 s. 
D) not enough information

Question 17

Gravitational force is greater for a satellite in elliptical orbit 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

To drop a package to Earth from a satellite,project it

Accepted Answer

A) straight downward. 
B) ahead at satellite speed. 
C) behind at satellite speed. 
D) none of the above 
A) straight downward. 
B) ahead at satellite speed. 
C) behind at satellite speed. 
D) none of the above

Question 19

Your weight is equal to mg when you are

Accepted Answer

A) firmly supported on a horizontal surface and in equilibrium. 
B) in Earth's gravitational field. 
C) anywhere except in Earth's orbit. 
D) all of the above 
A) firmly supported on a horizontal surface and in equilibrium. 
B) in Earth's gravitational field. 
C) anywhere except in Earth's orbit. 
D) all of the above

Question 20

Planets would crash into the Sun if it weren't for

Accepted Answer

A) their tangential velocities. 
B) their vast distances from the Sun. 
C) the inverse-square law. 
D) their relatively small masses. 
E) the fact that they are beyond the main gravitation of the Sun. 
A) their tangential velocities. 
B) their vast distances from the Sun. 
C) the inverse-square law. 
D) their relatively small masses. 
E) the fact that they are beyond the main gravitation of the Sun.

Exam 4: Gravity, Projectiles, and Satellites

A dropped ball gains speed because

Consider two planets in space that gravitationally attract each other.If the mass of one planet is doubled,and the distance between them doesn't change,then the force between them is

Newton discovered

As a bowling ball that rolls off the edge of a table falls,its horizontal component of motion

Strictly speaking,when you step off a curb you are momentarily

If there were no gravity,a cannonball fired upward at 45° would follow a straight-line path.Due to gravity,however,at the end of 3 s it is

How is stepping off a curb similar to taking a ride aboard an orbiting space vehicle?

Ignoring air resistance,what maximum speed can be given to a horizontally moving tennis ball as it clears the net 1.25 m high to remain within the edge of the court,which is 12.0 m from the bottom of the net?

The planet Neptune was discovered by perturbations of

Weight can be simulated in a space vehicle if the vehicle is

Your weight is defined to be the force

With no air resistance,a projectile fired at 50° has the same range as if it were fired at

A very massive object A and a less massive object B move toward each other under the influence of gravity.Which force,if either,is greater?

At some point between Earth and the Moon,the forces due to gravity on a space traveler would be the same when this point is

According to Newton,the greater the masses of interacting objects,the

If a projectile is fired straight up at a speed of 10 m/s,neglecting air resistance,the time it takes to reach the top of its path is

Gravitational force is greater for a satellite in elliptical orbit when it is at the

To drop a package to Earth from a satellite,project it

Your weight is equal to mg when you are

Planets would crash into the Sun if it weren't for

Patterns of Motion and Equilibrium

Newtons Laws of Motion

Momentum and Energy

Fluid Mechanics

Thermal Energy and Thermodynamics

Heat Transfer and Change of Phase

Static and Current Electricity

Magnetism and Electromagnetic Induction

Waves and Sound

Light

Atoms and the Periodic Table

The Atomic Nucleus and Radioactivity

Elements of Chemistry

How Atoms Bond and Molecules Attract

Mixtures

How Chemicals React

Two Classes of Chemical Reactions

Organic Compounds

Rocks and Minerals

Plate Tectonics and Earths Interior

Shaping Earths Surface

Geologic Time - Reading the Rock Record

The Oceans, Atmosphere, and Climatic Effects

Driving Forces of Weather

The Solar System

Stars and Galaxies

The Structure of Space and Time

Prologue: The Nature of Science

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