Module 2 - Newton's Laws

Question 1

What is the tendency of a force to rotate an object about an axis, fulcrum, or pivot?

Answer 1

Torque

Question 2

What is the formula for Torque?

Answer 2

Force x Lever Arm

Question 3

This is defined as the perpendicular distance from the axis of rotation to the line of action of the force.

Answer 3

Lever Arm

Question 4

What type of quantity is Torque?

Answer 4

Vector Quantity

Question 5

What is the standard unit of Torque?

Answer 5

Newton-meter

Question 6

A force of 100N is applied to the edge of an object that is 2.0m wide. What is the torque on the object?

Answer 6

200 Nm

Question 7

A force of 23.4N is applied to the edge of an object that is 9.13m wide. What is the torque on the object?

Answer 7

213.642 Nm

Question 8

A force of 13N is applied to the edge of an object that is 102.3m wide. What is the torque on the object?

Answer 8

1329.9 Nm

Question 9

A rope is tied to a door 10.4m from the hinge, creating an angle of 45 degrees. In an instant, a force of 23N is applied to the string. What is the torque of the string on the door?

Answer 9

169.14 Nm

Question 10

A rope is tied to a door 4.0m from the hinge, creating an angle of 62.0 degrees. In an instant, a force of 190.0N is applied to the string. What is the torque of the string on the door?

Answer 10

671.0 Nm

Question 11

A rope is tied to a door 8.68m from the hinge, creating an angle of 84.53 degrees. In an instant, a force of 293.28N is applied to the string. What is the torque of the string on the door?

Answer 11

2534.08 Nm

Question 12

What do you call when both clockwise and counterclockwise torques are equal?

Answer 12

Balanced Torques

Question 13

Which Condition of Equilibrium does Balanced Torques fall under?

Answer 13

Second Condition of Equilibrium

Question 14

This law states that an object in motion or rest will remain in motion or rest unless acted upon by a greater force.

Answer 14

Law of Inertia

Question 15

This is the tendency of an object to resist changes in its velocity.

Answer 15

Inertia

Question 16

This quantity measures the mass of an object relative to the Law of Inertia.

Answer 16

Mass

Question 17

This quantity measures the pull of gravity on an object.

Answer 17

Weight

Question 18

What is the formula for weight?

Answer 18

Mass multiplied by gravity

Question 19

This quantity is the property of an object that specifies how much resistance an object has to changes in its velocity.

Answer 19

Mass

Question 20

True or False:

Mass is an extrinsic property of an object.

Answer 20

False

Question 21

True or False:

Mass is a scalar quantity.

Answer 21

True

Question 22

What is the SI unit of mass?

Answer 22

Kilograms (kg)

Question 23

This property of an object is equal to the magnitude of the gravitational force exerted on the object.

Answer 23

Weight

Question 24

What is the SI unit of weight?

Answer 24

Newtons

Question 25

This refers to an interaction with an object by means of muscular activity and some change in the object's velocity.

Answer 25

Force

Question 26

True or False: Force always causes motion in an object.

Answer 26

False

Question 27

These are what causes any change in the velocity of an object.

Answer 27

Force

Question 28

This is defined as the kind of force resisting the relative motion of surfaces sliding against each other.

Answer 28

Frictional Force

Question 29

This kind of friction keeps an object at rest.

Answer 29

Static Friction

Question 30

This kind of friction slows the movement of an object once static friction is overcome.

Answer 30

Kinetic Friction

Question 31

This is the ratio of friction to normal force.

Answer 31

Coefficient of Friction

Question 32

True or False: The coefficient of static friction is greater than the coefficient of kinetic friction.

Answer 32

True

Question 33

This is known as the force with which gravity pulls an object.

Answer 33

Weight

Question 34

This is the force exerted on a body that may change its state of motion or rest.

Answer 34

Applied Force

Question 35

This is defined as the force that acts upward perpendicular to the surface that supports the weight of an object.

Answer 35

Normal Force

Question 36

This law of motion states that a particle's acceleration is proportional to the net force acting on it.

Answer 36

Law of Acceleration

Question 37

What is the equation for Newton's Second Law?

Answer 37

Acceleration is equal to the net force divided by the object's mass.