Question 1

A freely-falling object has a speed of 30 m/s at one instant.Exactly 2 seconds later its speed will be

Accepted Answer

A) the same. 
B) 40 m/s. 
C) 50 m/s. 
D) more than 50 m/s. 
A) the same. 
B) 40 m/s. 
C) 50 m/s. 
D) more than 50 m/s. C

Question 2

Aristotle believed that natural laws could be understood by

Accepted Answer

A) experiment. 
B) logic. 
C) patterns. 
D) mathematics. 
A) experiment. 
B) logic. 
C) patterns. 
D) mathematics. B

Question 3

A 10-N falling object encounters 10 N of air resistance.The net force on it is

Accepted Answer

A) 0 N. 
B) 4 N. 
C) 6 N. 
D) 10 N. 
A) 0 N. 
B) 4 N. 
C) 6 N. 
D) 10 N. A

Question 4

When Jean hikes a distance of 1 km in a time of one-half hour her average speed is

Accepted Answer

A) nearly 1 km/h. 
B) 1 km/h. 
C) slightly more than 1 km/h. 
D) 2 km/h. 
A) nearly 1 km/h. 
B) 1 km/h. 
C) slightly more than 1 km/h. 
D) 2 km/h.

Question 5

If Burl carried Paul piggy-back while standing in the middle of a scaffold,the tensions in the two supporting ropes would

Accepted Answer

A) cancel to zero. 
B) be equal. 
C) be unequal. 
D) more easily support Burl and Paul. 
A) cancel to zero. 
B) be equal. 
C) be unequal. 
D) more easily support Burl and Paul.

Question 6

If you toss a ball straight upward at 40 m/s with no air resistance,6 seconds later its speed is

Accepted Answer

A) zero. 
B) 10 m/s. 
C) 20 m/s. 
D) 30 m/s 
E) 40 m/s. 
A) zero. 
B) 10 m/s. 
C) 20 m/s. 
D) 30 m/s 
E) 40 m/s.

Question 7

An object is pulled with three forces: one at 20 N to the right,another at 40 N to the right,and the third at 30 N to the left.The net force is

Accepted Answer

A) 60 N to the right. 
B) 60 N to the left. 
C) 30 N to the left. 
D) none of the above 
A) 60 N to the right. 
B) 60 N to the left. 
C) 30 N to the left. 
D) none of the above

Question 8

A probe in space continues in its motion due to

Accepted Answer

A) very low friction. 
B) its own inertia. 
C) it seeking a continued state of motion. 
D) none of the above 
A) very low friction. 
B) its own inertia. 
C) it seeking a continued state of motion. 
D) none of the above

Question 9

Phil Physiker standing at the edge of a cliff throws one ball straight up and another ball straight down,both with the same speed.Both balls hit the ground at

Accepted Answer

A) different speeds. 
B) the same speed in the same time. 
C) the same speed in different times. 
D) none of the above 
A) different speeds. 
B) the same speed in the same time. 
C) the same speed in different times. 
D) none of the above

Question 10

The force of friction on a sliding object is 50 N.The applied force needed to maintain a constant velocity is

Accepted Answer

A) more than 50 N. 
B) less than 50 N. 
C) 50 N. 
A) more than 50 N. 
B) less than 50 N. 
C) 50 N.

Question 11

As an object freely falls,its

Accepted Answer

A) velocity increases. 
B) acceleration increases. 
C) both of these 
D) none of the above 
A) velocity increases. 
B) acceleration increases. 
C) both of these 
D) none of the above

Question 12

The amount of friction that occurs when two blocks slide against each other depends on

Accepted Answer

A) how much they are pressed together. 
B) the "stickiness" of atoms on their surfaces. 
C) the kinds of material being pressed. 
D) all of the above 
A) how much they are pressed together. 
B) the "stickiness" of atoms on their surfaces. 
C) the kinds of material being pressed. 
D) all of the above

Question 13

A 10-N falling object encounters 4 N of air resistance.The net force on it is

Accepted Answer

A) 0 N. 
B) 4 N. 
C) 6 N. 
D) 10 N. 
A) 0 N. 
B) 4 N. 
C) 6 N. 
D) 10 N.

Question 14

Distinguish between the concepts of velocity and acceleration,using a bowling ball's behavior as an example for each.

Accepted Answer

Velocity is a measure of how fast someth

Question 15

What did Galileo incorporate in his study of motion that Aristotle overlooked?

Accepted Answer

A) the role of distance 
B) the role of time 
C) the role of space 
D) none of the above 
A) the role of distance 
B) the role of time 
C) the role of space 
D) none of the above

Question 16

Acceleration and velocity are

Accepted Answer

A) different names for the same idea. 
B) very different from each other. 
C) concepts developed by Aristotle. 
D) none of the above 
A) different names for the same idea. 
B) very different from each other. 
C) concepts developed by Aristotle. 
D) none of the above

Question 17

What is the difference between speed,velocity,and instantaneous velocity? Give examples of each.

Accepted Answer

All describe motion,speed being the simp

Question 18

Lift an object against the force of gravity if you want to judge its

Accepted Answer

A) mass. 
B) weight. 
C) both the same 
D) none of the above 
A) mass. 
B) weight. 
C) both the same 
D) none of the above

Question 19

An object travels 8 m in the 1st second of travel,8 m again during the 2nd second of travel,and 8 m again during the 3rd second.Its acceleration is

Accepted Answer

A) 0 m/s2. 
B) 5 m/s2. 
C) 8 m/s2. 
D) 10 m/s2. 
E) more than 10 m/s2. 
A) 0 m/s2. 
B) 5 m/s2. 
C) 8 m/s2. 
D) 10 m/s2. 
E) more than 10 m/s2.

Question 20

When the bottom string is pulled slowly in the heavy-ball-and-strings demonstration (Figure 1.7 in your text),tension

Accepted Answer

A) in the top string is due to your pull plus the weight of the ball. 
B) is about the same in both strings. 
C) in the bottom string is zero. 
D) none of the above 
A) in the top string is due to your pull plus the weight of the ball. 
B) is about the same in both strings. 
C) in the bottom string is zero. 
D) none of the above

Exam 1: Patterns of Motion and Equilibrium

A freely-falling object has a speed of 30 m/s at one instant.Exactly 2 seconds later its speed will be

Aristotle believed that natural laws could be understood by

A 10-N falling object encounters 10 N of air resistance.The net force on it is

When Jean hikes a distance of 1 km in a time of one-half hour her average speed is

If Burl carried Paul piggy-back while standing in the middle of a scaffold,the tensions in the two supporting ropes would

If you toss a ball straight upward at 40 m/s with no air resistance,6 seconds later its speed is

An object is pulled with three forces: one at 20 N to the right,another at 40 N to the right,and the third at 30 N to the left.The net force is

A probe in space continues in its motion due to

Phil Physiker standing at the edge of a cliff throws one ball straight up and another ball straight down,both with the same speed.Both balls hit the ground at

The force of friction on a sliding object is 50 N.The applied force needed to maintain a constant velocity is

As an object freely falls,its

The amount of friction that occurs when two blocks slide against each other depends on

A 10-N falling object encounters 4 N of air resistance.The net force on it is

Distinguish between the concepts of velocity and acceleration,using a bowling ball's behavior as an example for each.

What did Galileo incorporate in his study of motion that Aristotle overlooked?

Acceleration and velocity are

What is the difference between speed,velocity,and instantaneous velocity? Give examples of each.

Lift an object against the force of gravity if you want to judge its

An object travels 8 m in the 1st second of travel,8 m again during the 2nd second of travel,and 8 m again during the 3rd second.Its acceleration is

When the bottom string is pulled slowly in the heavy-ball-and-strings demonstration (Figure 1.7 in your text),tension

Newtons Laws of Motion

Momentum and Energy

Gravity, Projectiles, and Satellites

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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