Question 1

Angular momentum has units of ______________.

Accepted Answer

The answer of Angular momentum has units of ______________....

Question 2

The linear momentum of an object can be determined by taking the product of the mass and the

Accepted Answer

A)  acceleration of the object. 
B)  velocity of the object. 
C)  distance the object moves. 
D)  displacement of the object. 
A)  acceleration of the object. 
B)  velocity of the object. 
C)  distance the object moves. 
D)  displacement of the object.

Question 3

A spacecraft in space keeps going at the same velocity,even without firing its rockets,in accordance with the _______________ law of motion.

Accepted Answer

A)  fourth 
B)  first 
C)  second 
D)  third 
A)  fourth 
B)  first 
C)  second 
D)  third

Question 4

The speed of a comet in its orbit around the Sun is ______________ when its distance from the Sun is least (perihelion).

Accepted Answer

A)  zero 
B)  reversed 
C)  greatest 
D)  least 
A)  zero 
B)  reversed 
C)  greatest 
D)  least

Question 5

The total linear momentum of an isolated system of masses remains the same if there are no external ______________ acting on the system.

Accepted Answer

A)  forces 
B)  torques 
C)  unbalanced forces 
D)  unbalanced torques 
A)  forces 
B)  torques 
C)  unbalanced forces 
D)  unbalanced torques

Question 6

According to Newton's second law,the force required to accelerate an object is equal to

Accepted Answer

A)  its acceleration divided by its mass. 
B)  its mass times the acceleration. 
C)  its mass divided by the velocity. 
D)  its weight times the velocity. 
A)  its acceleration divided by its mass. 
B)  its mass times the acceleration. 
C)  its mass divided by the velocity. 
D)  its weight times the velocity.

Question 7

If an unbalanced force of 8 N force acts on a 7-kg object,what is its acceleration?

Accepted Answer

A)  56 m/s2 
B)  1.1 m/s2 
C)  0.88 m/s2 
D)  15 m/s2 
E)  cannot be determined 
A)  56 m/s2 
B)  1.1 m/s2 
C)  0.88 m/s2 
D)  15 m/s2 
E)  cannot be determined

Question 8

What must be exerted on an object to change the angular momentum?

Accepted Answer

A)  Linear momentum 
B)  Torque 
C)  A force parallel to the motion 
D)  Inertia 
A)  Linear momentum 
B)  Torque 
C)  A force parallel to the motion 
D)  Inertia

Question 9

An automobile travels due north with a speed of 77 km/h that is decreasing.All forces considered,the unbalanced force acting on the auto is

Accepted Answer

A)  zero. 
B)  southward. 
C)  northward. 
D)  downward. 
E)  upward. 
A)  zero. 
B)  southward. 
C)  northward. 
D)  downward. 
E)  upward.

Question 10

A constant net force acting on an object that is free to move will produce a constant

Accepted Answer

A)  speed. 
B)  velocity. 
C)  displacement. 
D)  acceleration. 
E)  distance. 
A)  speed. 
B)  velocity. 
C)  displacement. 
D)  acceleration. 
E)  distance.

Question 11

Two equal and opposite forces of 6.0 N act on an object.The unbalanced force on the object

Accepted Answer

A)  is 6.0 N. 
B)  is 0 N. 
C)  is 8 N. 
D)  is 12 N. 
E)  cannot be determined from given information. 
A)  is 6.0 N. 
B)  is 0 N. 
C)  is 8 N. 
D)  is 12 N. 
E)  cannot be determined from given information.

Question 12

In an equation,the symbol m generally stands for

Accepted Answer

A)  inertia. 
B)  torque. 
C)  momentum. 
D)  mass. 
E)  meters. 
A)  inertia. 
B)  torque. 
C)  momentum. 
D)  mass. 
E)  meters.

Question 13

An automobile travels due north with a constant speed of 81 km/h.All forces considered,the unbalanced force acting on the auto is

Accepted Answer

A)  zero. 
B)  southward. 
C)  northward. 
D)  downward. 
E)  upward. 
A)  zero. 
B)  southward. 
C)  northward. 
D)  downward. 
E)  upward.

Question 14

If an object on Earth weighs 100 N,what is its weight in pounds?

Accepted Answer

A)  22 
B)  100 
C)  10 
D)  220 
E)  450 
A)  22 
B)  100 
C)  10 
D)  220 
E)  450

Question 15

In the SI,weight is expressed in units of ______________.

Accepted Answer

The answer of In the SI,weight is expressed in units...

Question 16

To cause an object to move in a circle,a ______________ force is necessary.

Accepted Answer

A)  balanced 
B)  functional 
C)  centripetal 
D)  centrifugal 
A)  balanced 
B)  functional 
C)  centripetal 
D)  centrifugal

Question 17

Calculate the centripetal force on a 3.0-kg object moving in a horizontal circular path of 20-m radius with a speed of 8.0 m/s.

Accepted Answer

The answer of Calculate the centripetal force on a 3.0-kg...

Question 18

A quantity that is capable of producing motion or a change in motion is called a(n)______________.

Accepted Answer

The answer of A quantity that is capable of producing...

Question 19

What is the force of gravity acting on a 1-kg mass??(g = 9.8 m/s2)

Accepted Answer

Question 20

Jet propulsion can be explained in terms of Newton's third law and the ______________.

Accepted Answer

conservati

Exam 3: Force and Motion

Angular momentum has units of ______________.

The linear momentum of an object can be determined by taking the product of the mass and the

A spacecraft in space keeps going at the same velocity,even without firing its rockets,in accordance with the _______________ law of motion.

The speed of a comet in its orbit around the Sun is ______________ when its distance from the Sun is least (perihelion).

The total linear momentum of an isolated system of masses remains the same if there are no external ______________ acting on the system.

According to Newton's second law,the force required to accelerate an object is equal to

If an unbalanced force of 8 N force acts on a 7-kg object,what is its acceleration?

What must be exerted on an object to change the angular momentum?

An automobile travels due north with a speed of 77 km/h that is decreasing.All forces considered,the unbalanced force acting on the auto is

A constant net force acting on an object that is free to move will produce a constant

Two equal and opposite forces of 6.0 N act on an object.The unbalanced force on the object

In an equation,the symbol m generally stands for

An automobile travels due north with a constant speed of 81 km/h.All forces considered,the unbalanced force acting on the auto is

If an object on Earth weighs 100 N,what is its weight in pounds?

In the SI,weight is expressed in units of ______________.

To cause an object to move in a circle,a ______________ force is necessary.

Calculate the centripetal force on a 3.0-kg object moving in a horizontal circular path of 20-m radius with a speed of 8.0 m/s.

A quantity that is capable of producing motion or a change in motion is called a(n)______________.

What is the force of gravity acting on a 1-kg mass??(g = 9.8 m/s2)

Jet propulsion can be explained in terms of Newton's third law and the ______________.

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What is the force of gravity acting on a 1-kg mass??(g = 9.8 m/s²)