Question 1

If an object's mass is decreasing while a constant force is applied to the object,the acceleration

Accepted Answer

A) decreases. 
B) increases. 
C) remains the same. 
A) decreases. 
B) increases. 
C) remains the same.

Question 2

A parachutist steps from a hovering helicopter and falls for 5 s before reaching terminal velocity.During this 5-s interval,her acceleration

Accepted Answer

A) is constant. 
B) increases. 
C) decreases. 
D) is zero. 
E) none of the above 
A) is constant. 
B) increases. 
C) decreases. 
D) is zero. 
E) none of the above

Question 3

A math book and a science book are tied together with a length of string.With the string taut,one book is pushed off the edge of a table.As it falls,the other book is dragged horizontally across the table surface.With no friction,acceleration of the books is

Accepted Answer

A) zero. 
B) g/2. 
C) g. 
D) between zero and g. 
E) greater than g. 
A) zero. 
B) g/2. 
C) g. 
D) between zero and g. 
E) greater than g.

Question 4

A falling boulder experiences a force,which is responsible for its acceleration.What is the reaction to this force? How can this question be better phrased?

Accepted Answer

The force that acts on the boulder is Ea

Question 5

A car traveling at 100 km/h strikes an unfortunate bug that splatters on the windshield.The force of impact is greater on the

Accepted Answer

A) bug. 
B) car. 
C) same for both 
A) bug. 
B) car. 
C) same for both

Question 6

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 7

A stone is thrown vertically upward.At the top of its vertical 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 8

A 10-N block and a 1-N block lie on a horizontal frictionless table.To push them with equal acceleration,we would have to push with

Accepted Answer

A) equal forces on each block. 
B) 10 times as much force on the heavier block. 
C) 10 squared or 100 times as much force on the heavier block. 
D) one-tenth as much force on the heavier block. 
E) none of the above 
A) equal forces on each block. 
B) 10 times as much force on the heavier block. 
C) 10 squared or 100 times as much force on the heavier block. 
D) one-tenth as much force on the heavier block. 
E) none of the above

Question 9

A force of 1 N accelerates a 1-kg mass at 1 m/s2.The acceleration of a 2-kg mass acted upon by a force of 2 N is

Accepted Answer

A) half as much. 
B) twice as much. 
C) the same. 
D) none of the above 
A) half as much. 
B) twice as much. 
C) the same. 
D) none of the above

Question 10

If gravity between the Sun and Earth suddenly vanished,Earth would move in

Accepted Answer

A) a curved path. 
B) an outward spiral path. 
C) an inward spiral path. 
D) a straight-line path. 
A) a curved path. 
B) an outward spiral path. 
C) an inward spiral path. 
D) a straight-line path.

Question 11

A jumbo jet of mass 100,000 kg during takeoff experience a thrust for each of its four engines of 50,000 N,producing an acceleration of

Accepted Answer

A) 0.5 m/s2. 
B) 1 m/s2. 
C) 2 m/s2. 
D) 4 m/s2. 
E) none of the above 
A) 0.5 m/s2. 
B) 1 m/s2. 
C) 2 m/s2. 
D) 4 m/s2. 
E) none of the above

Question 12

A vase sits at rest on a table.If the action force is Earth pulling downward on the vase,the reaction force is the

Accepted Answer

A) table pushing upward on the vase. 
B) vase pulling upward on Earth. 
C) vase pulling upward on both the table and Earth. 
D) none of the above 
A) table pushing upward on the vase. 
B) vase pulling upward on Earth. 
C) vase pulling upward on both the table and Earth. 
D) none of the above

Question 13

A quick jerk on a sheet of paper beneath a box of cereal doesn't topple the box,which best illustrates that

Accepted Answer

A) the box has no acceleration. 
B) there is an action-reaction pair of forces. 
C) gravity tends to hold the box secure. 
D) the box has inertia. 
A) the box has no acceleration. 
B) there is an action-reaction pair of forces. 
C) gravity tends to hold the box secure. 
D) the box has inertia.

Question 14

A 1-kg ball is thrown straight up at 10 m/s.Neglecting air resistance,the net force that acts on the ball when it is halfway to the top of its path is

Accepted Answer

A) 1/2 N. 
B) 1 N. 
C) 5 N. 
D) 7.5 N. 
E) 10 N. 
A) 1/2 N. 
B) 1 N. 
C) 5 N. 
D) 7.5 N. 
E) 10 N.

Question 15

A heavy block at rest is suspended by a vertical rope.When the block is raised at constant velocity,the rope tension

Accepted Answer

A) is less than its weight. 
B) equals its weight. 
C) is greater than its weight. 
A) is less than its weight. 
B) equals its weight. 
C) is greater than its weight.

Question 16

A sack of potatoes weighing 200 N falls from an airplane.As the velocity of fall increases,air resistance also increases.When air resistance equals 200 N,the sack's acceleration is

Accepted Answer

A) 0 m/s2. 
B) 5 m/s2. 
C) 10 m/s2. 
D) infinite. 
E) none of the above 
A) 0 m/s2. 
B) 5 m/s2. 
C) 10 m/s2. 
D) infinite. 
E) none of the above

Question 17

If a non-rotating object has no acceleration,then we can say for certain that it is

Accepted Answer

A) at rest. 
B) moving at constant non-zero velocity. 
C) in mechanical equilibrium. 
D) all of the above 
E) none of the above 
A) at rest. 
B) moving at constant non-zero velocity. 
C) in mechanical equilibrium. 
D) all of the above 
E) none of the above

Question 18

A bird sitting on the limb of a tree is moving about 30 km/s with respect to the Sun.If the bird takes 1 second to drop down to a worm below,the worm would be 30 km downrange from the bird when it reached the ground.This faulty reasoning is best countered with Newton's

Accepted Answer

A) law of inertia. 
B) law of gravity. 
C) laws of motion. 
D) none of the above 
A) law of inertia. 
B) law of gravity. 
C) laws of motion. 
D) none of the above

Question 19

If an object falls with constant acceleration,the velocity of the object must

Accepted Answer

A) be constant also. 
B) continually change by the same amount each second. 
C) continually change by varying amounts,depending on its speed. 
D) continually decrease. 
E) none of the above 
A) be constant also. 
B) continually change by the same amount each second. 
C) continually change by varying amounts,depending on its speed. 
D) continually decrease. 
E) none of the above

Question 20

A falling object that has reached its terminal speed continues to gain

Accepted Answer

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

Exam 2: Newtons Laws of Motion

If an object's mass is decreasing while a constant force is applied to the object,the acceleration

A parachutist steps from a hovering helicopter and falls for 5 s before reaching terminal velocity.During this 5-s interval,her acceleration

A math book and a science book are tied together with a length of string.With the string taut,one book is pushed off the edge of a table.As it falls,the other book is dragged horizontally across the table surface.With no friction,acceleration of the books is

A falling boulder experiences a force,which is responsible for its acceleration.What is the reaction to this force? How can this question be better phrased?

A car traveling at 100 km/h strikes an unfortunate bug that splatters on the windshield.The force of impact is greater on the

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

A stone is thrown vertically upward.At the top of its vertical path the force acting on it is

A 10-N block and a 1-N block lie on a horizontal frictionless table.To push them with equal acceleration,we would have to push with

A force of 1 N accelerates a 1-kg mass at 1 m/s2.The acceleration of a 2-kg mass acted upon by a force of 2 N is

If gravity between the Sun and Earth suddenly vanished,Earth would move in

A jumbo jet of mass 100,000 kg during takeoff experience a thrust for each of its four engines of 50,000 N,producing an acceleration of

A vase sits at rest on a table.If the action force is Earth pulling downward on the vase,the reaction force is the

A quick jerk on a sheet of paper beneath a box of cereal doesn't topple the box,which best illustrates that

A 1-kg ball is thrown straight up at 10 m/s.Neglecting air resistance,the net force that acts on the ball when it is halfway to the top of its path is

A heavy block at rest is suspended by a vertical rope.When the block is raised at constant velocity,the rope tension

A sack of potatoes weighing 200 N falls from an airplane.As the velocity of fall increases,air resistance also increases.When air resistance equals 200 N,the sack's acceleration is

If a non-rotating object has no acceleration,then we can say for certain that it is

A bird sitting on the limb of a tree is moving about 30 km/s with respect to the Sun.If the bird takes 1 second to drop down to a worm below,the worm would be 30 km downrange from the bird when it reached the ground.This faulty reasoning is best countered with Newton's

If an object falls with constant acceleration,the velocity of the object must

A falling object that has reached its terminal speed continues to gain

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 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

Filters

A force of 1 N accelerates a 1-kg mass at 1 m/s².The acceleration of a 2-kg mass acted upon by a force of 2 N is