Question 1

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 becomes

Accepted Answer

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

Question 2

If an apple experiences a constant net force, it will have a constant

Accepted Answer

A)  velocity.
B)  speed.
C)  acceleration.
D)  position.
E)  more than one of the aboveF) B) and D)
G) C) and E)

Question 3

When the bottom string is pulled slowly in the heavy-ball-and-strings demonstration (Figure 4.8 in your book) , 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) B) and C)
E) A) and C)

Question 4

Recall Galileo's Leaning Tower experiment. With negligible air resistance, a heavy and a light object fall

Accepted Answer

A)  with equal accelerations.
B)  with the same increases in speed.
C)  to the ground in equal times.
D)  all of the aboveE) A) and D)
F) B) and C)

Question 5

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

Accepted Answer

A)  1/2 N.
B)  1 N.
C)  5 N.
D)  7.5 N.
E)  10 N.F) All of the above
G) B) and D)

Question 6

A car traveling at 22 m/s comes to an abrupt halt in 0.1 second when it hits a tree. What is the deceleration of the car?

Accepted Answer

A)  110 m/s2
B)  220 m/s2
C)  800 m/s2
D)  880 m/s2
E)  need more informationF) A) and C)
G) B) and C)

Question 7

A heavy ball hangs by a string, with a second string attached to its bottom (Figure 4.8 in your book) . A quick pull on the bottom string breaks the

Accepted Answer

A)  top string.
B)  bottom string.
C)  top or bottom string equally.D) None of the above
E) All of the above

Question 8

A ball is thrown vertically into the air. Because of air resistance, its time coming down compared to its time going up is

Accepted Answer

A)  less.
B)  the same.
C)  more.D) All of the above
E) B) and C)

Question 9

Which has zero acceleration? An object

Accepted Answer

A)  at rest.
B)  moving at constant velocity.
C)  in mechanical equilibrium.
D)  all of the above
E)  none of the aboveF) A) and B)
G) D) and E)

Question 10

An object released from rest on another planet requires one second to fall a distance of 6 meters. What is the acceleration due to gravity on this planet?

Accepted Answer

A)  3 m/s2
B)  6 m/s2
C)  12 m/s2
D)  15 m/s2
E)  none of the aboveF) C) and E)
G) A) and C)

Question 11

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

Accepted Answer

A)  the same as the force on the apple.
B)  10 times more than the force on the apple.
C)  one-tenth as much as on the apple.
D)  zero.E) A) and B)
F) A) and C)

Question 12

If the mass of a cart is quickly loaded to have twice the mass while a propelling force remains constant, the cart's acceleration

Accepted Answer

A)  quadruples.
B)  doubles.
C)  stays the same.
D)  halves.
E)  none of theseF) A) and E)
G) C) and D)

Question 13

A ball is thrown vertically into the air. Because of air resistance, its speed when it returns to its starting level compared with its initial speed is

Accepted Answer

A)  less.
B)  the same.
C)  more.D) A) and C)
E) All of the above

Question 14

A boulder following a straight-line path at constant velocity has

Accepted Answer

A)  a net force acting upon it in the direction of motion.
B)  zero acceleration.
C)  no forces acting on it.
D)  none of the aboveE) All of the above
F) B) and D)

Question 15

A constant net force on a rail-road car produces constant

Accepted Answer

A)  velocity.
B)  acceleration.
C)  both of these
D)  neither of theseE) C) and D)
F) B) and D)

Question 16

When you stand at rest with your left foot on one bathroom scale and your right foot on a similar scale, each of the scales will

Accepted Answer

A)  read half your weight.
B)  read your weight.
C)  show readings that when added equal your weight.
D)  cancel your weight.E) A) and D)
F) A) and C)

Question 17

A bowling ball and a baseball accelerate equally when falling in a vacuum because

Accepted Answer

A)  their velocities are the same.
B)  the ratio of their weights to mass is the same.
C)  the force of gravity is the same for each in a vacuum.
D)  the force of gravity does not act in a vacuum.
E)  none of the aboveF) B) and E)
G) B) and D)

Question 18

If more horizontal force is applied to a sliding object than is needed to maintain a constant velocity, the object

Accepted Answer

A)  accelerates in the direction of the applied force.
B)  accelerates opposite the direction of the applied force.
C)  experiences greater friction.
D)  none of the aboveE) C) and D)
F) A) and B)

Exam 4: Newtons Second Law of Motion

A heavy ball hangs by a string, with a second string attached to its bottom (Figure 4.8 in your book) . A quick pull on the bottom string breaks the

Correct Answer
verified

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

Correct Answer
verified

If an apple experiences a constant net force, it will have a constant

Correct Answer
verified

A boulder following a straight-line path at constant velocity has

Correct Answer
verified

A ball is thrown vertically into the air. Because of air resistance, its speed when it returns to its starting level compared with its initial speed is

Correct Answer
verified

When you stand at rest with your left foot on one bathroom scale and your right foot on a similar scale, each of the scales will

Correct Answer
verified

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 becomes

Correct Answer
verified

An object released from rest on another planet requires one second to fall a distance of 6 meters. What is the acceleration due to gravity on this planet?

Correct Answer
verified

A car traveling at 22 m/s comes to an abrupt halt in 0.1 second when it hits a tree. What is the deceleration of the car?

Correct Answer
verified

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

Correct Answer
verified

When the bottom string is pulled slowly in the heavy-ball-and-strings demonstration (Figure 4.8 in your book) , tension

Correct Answer
verified

If the mass of a cart is quickly loaded to have twice the mass while a propelling force remains constant, the cart's acceleration

Correct Answer
verified

A constant net force on a rail-road car produces constant

Correct Answer
verified

If more horizontal force is applied to a sliding object than is needed to maintain a constant velocity, the object

Correct Answer
verified

Which has zero acceleration? An object

Correct Answer
verified

Recall Galileo's Leaning Tower experiment. With negligible air resistance, a heavy and a light object fall

Correct Answer
verified

A ball is thrown vertically into the air. Because of air resistance, its time coming down compared to its time going up is

Correct Answer
verified

A bowling ball and a baseball accelerate equally when falling in a vacuum because

Correct Answer
verified

Exam 4: Newtons Second Law of Motion

A heavy ball hangs by a string, with a second string attached to its bottom (Figure 4.8 in your book) . A quick pull on the bottom string breaks the

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

If an apple experiences a constant net force, it will have a constant

Correct AnswerverifiedShow Answer

A boulder following a straight-line path at constant velocity has

Correct AnswerverifiedShow Answer

A ball is thrown vertically into the air. Because of air resistance, its speed when it returns to its starting level compared with its initial speed is

Correct AnswerverifiedShow Answer

When you stand at rest with your left foot on one bathroom scale and your right foot on a similar scale, each of the scales will

Correct AnswerverifiedShow 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 becomes

Correct AnswerverifiedShow Answer

An object released from rest on another planet requires one second to fall a distance of 6 meters. What is the acceleration due to gravity on this planet?

Correct AnswerverifiedShow Answer

A car traveling at 22 m/s comes to an abrupt halt in 0.1 second when it hits a tree. What is the deceleration of the car?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

When the bottom string is pulled slowly in the heavy-ball-and-strings demonstration (Figure 4.8 in your book) , tension

Correct AnswerverifiedShow Answer

If the mass of a cart is quickly loaded to have twice the mass while a propelling force remains constant, the cart's acceleration

Correct AnswerverifiedShow Answer

A constant net force on a rail-road car produces constant

Correct AnswerverifiedShow Answer

If more horizontal force is applied to a sliding object than is needed to maintain a constant velocity, the object

Correct AnswerverifiedShow Answer

Which has zero acceleration? An object

Correct AnswerverifiedShow Answer

Recall Galileo's Leaning Tower experiment. With negligible air resistance, a heavy and a light object fall

Correct AnswerverifiedShow Answer

A ball is thrown vertically into the air. Because of air resistance, its time coming down compared to its time going up is

Correct AnswerverifiedShow Answer

A bowling ball and a baseball accelerate equally when falling in a vacuum because

Correct AnswerverifiedShow Answer

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