Question 1

Inside the interior of a truck that moves at constant velocity is a package that drops from the midpoint of the ceiling. The package hits the floor

Accepted Answer

A) exactly below the midpoint of the ceiling. 
B) ahead of the midpoint of the ceiling. 
C) behind the midpoint of the ceiling. 
D) more information is needed 
E) none of the above 
A) exactly below the midpoint of the ceiling. 
B) ahead of the midpoint of the ceiling. 
C) behind the midpoint of the ceiling. 
D) more information is needed 
E) none of the above

Question 2

A rock is thrown vertically upward. At the top of its straight-line path the force acting on it is

Accepted Answer

A) zero. 
B) only the force due to gravity. 
C) due to air resistance. 
D) both due to gravity and air resistance. 
A) zero. 
B) only the force due to gravity. 
C) due to air resistance. 
D) both due to gravity and air resistance.

Question 3

When you toss a coin straight up, it moves upward, turns around, and drops. During this time the acceleration of the coin is

Accepted Answer

A) upward and constant. 
B) downward and constant. 
C) first decreasing, then increasing. 
D) zero throughout its up and down motion. 
A) upward and constant. 
B) downward and constant. 
C) first decreasing, then increasing. 
D) zero throughout its up and down motion.

Question 4

A 10-kg brick and a 1-kg book are dropped in a vacuum. The force of gravity on the 10-kg brick is

Accepted Answer

A) the same as the force on the 1-kg book. 
B) 5 times as much as the force on the 1-kg book. 
C) 10 times as much as the force on the 1-kg book. 
D) zero. 
A) the same as the force on the 1-kg book. 
B) 5 times as much as the force on the 1-kg book. 
C) 10 times as much as the force on the 1-kg book. 
D) zero.

Question 5

Two objects of the same size but unequal weights are dropped from a tall tower. Taking air resistance into consideration, the object to hit the ground first will be the

Accepted Answer

A) lighter object. 
B) heavier object. 
C) both hit at the same time. 
D) not enough information 
A) lighter object. 
B) heavier object. 
C) both hit at the same time. 
D) not enough information

Question 6

When a 500-N parachutist opens his chute and experiences 800 N of air resistance, the net force on him is

Accepted Answer

A) 300 N downward. 
B) 500 N downward. 
C) 800 N downward. 
D) 300 N upward. 
E) 500 N upward. 
A) 300 N downward. 
B) 500 N downward. 
C) 800 N downward. 
D) 300 N upward. 
E) 500 N upward.

Question 7

A player hits a ball with a bat. If one part of the interaction is the bat against the ball, the other part is the

Accepted Answer

A) air resistance on the ball. 
B) weight of the ball. 
C) ball against the bat. 
D) grip of the player's hand against the ball. 
E) none of the above 
A) air resistance on the ball. 
B) weight of the ball. 
C) ball against the bat. 
D) grip of the player's hand against the ball. 
E) none of the above

Question 8

A 10-kg brick and a 1-kg book are dropped in a vacuum. The acceleration of the 10-kg brick is

Accepted Answer

A) the same as that of the 1-kg book. 
B) 5 times as much as for the 1-kg book. 
C) 10 times as much as for the 1-kg book. 
D) zero. 
A) the same as that of the 1-kg book. 
B) 5 times as much as for the 1-kg book. 
C) 10 times as much as for the 1-kg book. 
D) zero.

Question 9

Newton's second law directly involves

Accepted Answer

A) speed. 
B) velocity. 
C) acceleration. 
D) none of the above 
A) speed. 
B) velocity. 
C) acceleration. 
D) none of the above

Question 10

The force required to maintain an object at a constant velocity in free space is equal to

Accepted Answer

A) zero. 
B) the mass of the object. 
C) the weight of the object. 
D) the force required to stop it. 
A) zero. 
B) the mass of the object. 
C) the weight of the object. 
D) the force required to stop it.

Question 11

If an object's mass decreases while a constant force acts on it, the acceleration

Accepted Answer

A) decreases. 
B) remains the same. 
C) increases. 
D) will be zero. 
A) decreases. 
B) remains the same. 
C) increases. 
D) will be zero.

Question 12

What applied horizontal force will accelerate a 400-kg crate at 1 m/s2 across a factory floor against a friction force half its weight?

Accepted Answer

A) 600 N 
B) 1600 N 
C) 2000 N 
D) 2400 N 
E) none of the above 
A) 600 N 
B) 1600 N 
C) 2000 N 
D) 2400 N 
E) none of the above

Question 13

You toss a ball upward where air resistance is negligible. After the ball leaves your hand the force on it

Accepted Answer

A) gradually decreases until the ball reaches the top of its path. 
B) first acts upward and then downward after it reaches the top. 
C) is the single force due to gravity, always directed downward. 
D) none of the above. 
A) gradually decreases until the ball reaches the top of its path. 
B) first acts upward and then downward after it reaches the top. 
C) is the single force due to gravity, always directed downward. 
D) none of the above.

Question 14

To steadily (constantly)increase the velocity of something requires a

Accepted Answer

A) steadily increasing force. 
B) constant force. 
C) decreasing force. 
D) none of the above 
A) steadily increasing force. 
B) constant force. 
C) decreasing force. 
D) none of the above

Question 15

When a boulder and a pebble are dropped, why does the pebble pick up speed as quickly as the boulder, even though less gravity acts on it? In other words, why do they accelerate equally?

Accepted Answer

Acceleration depends not only on the for

Question 16

Earth pulls on the Moon. Similarly the Moon pulls on Earth, evidence that

Accepted Answer

A) Earth and Moon pull on each other. 
B) Earth's and Moon's pulls comprise an action-reaction pair. 
C) both 
D) none of the above 
A) Earth and Moon pull on each other. 
B) Earth's and Moon's pulls comprise an action-reaction pair. 
C) both 
D) none of the above

Question 17

An elephant and a feather fall from a tree through the air to the ground below. The force of air resistance is greater on the

Accepted Answer

A) elephant. 
B) feather. 
C) same on each. 
A) elephant. 
B) feather. 
C) same on each.

Question 18

A person is attracted toward the center of Earth by a 500-N gravitational force. The force of attraction of Earth toward the person is

Accepted Answer

A) very, very small. 
B) very, very large. 
C) 500 N. 
A) very, very small. 
B) very, very large. 
C) 500 N.

Question 19

Both ends of a piece of rope are pulled by two people in a tug-of-war. If each pulls with a 400-N force, the tension in the rope is

Accepted Answer

A) 0 N. 
B) 400 N. 
C) 600 N. 
D) 800 N. 
E) none of the above 
A) 0 N. 
B) 400 N. 
C) 600 N. 
D) 800 N. 
E) none of the above

Question 20

A given net force propels an object along a straight-line path. If the net force were doubled, its acceleration would

Accepted Answer

A) quadruple. 
B) double. 
C) stay the same. 
D) be half. 
E) none of the above 
A) quadruple. 
B) double. 
C) stay the same. 
D) be half. 
E) none of the above

Exam 2: Newtons Laws of Motion

Inside the interior of a truck that moves at constant velocity is a package that drops from the midpoint of the ceiling. The package hits the floor

A rock is thrown vertically upward. At the top of its straight-line path the force acting on it is

When you toss a coin straight up, it moves upward, turns around, and drops. During this time the acceleration of the coin is

A 10-kg brick and a 1-kg book are dropped in a vacuum. The force of gravity on the 10-kg brick is

Two objects of the same size but unequal weights are dropped from a tall tower. Taking air resistance into consideration, the object to hit the ground first will be the

When a 500-N parachutist opens his chute and experiences 800 N of air resistance, the net force on him is

A player hits a ball with a bat. If one part of the interaction is the bat against the ball, the other part is the

A 10-kg brick and a 1-kg book are dropped in a vacuum. The acceleration of the 10-kg brick is

Newton's second law directly involves

The force required to maintain an object at a constant velocity in free space is equal to

If an object's mass decreases while a constant force acts on it, the acceleration

What applied horizontal force will accelerate a 400-kg crate at 1 m/s2 across a factory floor against a friction force half its weight?

You toss a ball upward where air resistance is negligible. After the ball leaves your hand the force on it

To steadily (constantly)increase the velocity of something requires a

When a boulder and a pebble are dropped, why does the pebble pick up speed as quickly as the boulder, even though less gravity acts on it? In other words, why do they accelerate equally?

Earth pulls on the Moon. Similarly the Moon pulls on Earth, evidence that

An elephant and a feather fall from a tree through the air to the ground below. The force of air resistance is greater on the

A person is attracted toward the center of Earth by a 500-N gravitational force. The force of attraction of Earth toward the person is

Both ends of a piece of rope are pulled by two people in a tug-of-war. If each pulls with a 400-N force, the tension in the rope is

A given net force propels an object along a straight-line path. If the net force were doubled, its acceleration would

Patterns of Motion and Equilibrium

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 Timereading 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

Filters

What applied horizontal force will accelerate a 400-kg crate at 1 m/s² across a factory floor against a friction force half its weight?