Question 1

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 aboveE) A) and B)
F) B) and D)

Question 2

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.E) All of the above
F) C) and D)

Question 3

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 bothD) A) and B)
E) A) and C)

Question 4

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 aboveF) C) and D)
G) None of the above

Question 5

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 6

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.E) B) and D)
F) B) and C)

Question 7

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.E) All of the above
F) A) and D)

Question 8

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 aboveE) A) and B)
F) All of the above

Question 9

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.E) A) and B)
F) B) and D)

Question 10

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.F) A) and C)
G) A) and D)

Question 11

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 aboveF) B) and D)
G) A) and C)

Question 12

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 aboveE) C) and D)
F) A) and B)

Question 13

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 aboveF) C) and D)
G) A) and E)

Question 14

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 aboveF) None of the above
G) A) and B)

Question 15

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.F) All of the above
G) A) and C)

Question 16

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.D) All of the above
E) None of the above

Question 17

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 aboveF) C) and D)
G) A) and E)

Question 18

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 aboveF) A) and E)
G) A) and D)

Question 19

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.D) A) and C)
E) A) and B)

Question 20

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 aboveE) None of the above
F) A) and B)

Exam 2: Newtons Laws of Motion

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedThe force that acts on the boulder is Ea...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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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

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The force that acts on the boulder is Ea...
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