Unit 1 (Exam 9/19/17)

Question 1

Vector

Answer 1

A Magnitude with a direction ( 75 MPH East)

Question 2

Scalars

Answer 2

A Magnitude (75 Mph) (Time, Temperature, Speed)

Question 3

magnitude

Answer 3

Quantity; a number

Question 4

Velocity

Answer 4

Rate of change of position

Question 5

Pythagorean Theorem

Answer 5

a^2 +b^2=c^2

Question 6

When vectors are parallel, you just

Answer 6

add them

Question 7

If vectors are not parallel, to solve, you just

Answer 7

break them into components

Question 8

Forces

Answer 8

Push or pull on an object that may or may not change the motion of an object

Question 9

Fg

Answer 9

Force due to gravitational field (mass * gravity)

Question 10

FG

Answer 10

Universal Force between any two masses

Question 11

Friction

Answer 11

A force that opposes motion or the possibility of motion

Question 12

FN

Answer 12

Normal Force

Question 13

Fp

Answer 13

Push/Pull

Question 14

F-el

Answer 14

Elastic/Spring Force- A force due to an object that will change its shape or length

Question 15

Hooke’s Law

Answer 15

F-el= KΔX
K=Spring constant (in Newtons/Meter)
ΔX=Stretch/compression of spring

Question 16

FB

Answer 16

Buoyant Force- Force due to the displacement of fluid

Question 17

FT

Answer 17

Tension=Force due to a rigid object (Ropes)

Question 18

FN

Answer 18

Normal Force= Force due to surface to surface contact and it is oriented perpendicular to the surface

Question 19

Acceleration is

Answer 19

A result of a force

Question 20

What are the 8 Mechanical Forces?

Answer 20

Tension
Bouyancy
Normal
Gravitational
Push/Pull
Friction
Elastic/Spring

Question 21

What are the three conditions to consider when evaluating a problem

Answer 21

Static equilibrium
Dynamic Equilibrium
Accelerated Motion

Question 22

Newton’s first law of motion

Answer 22

An Object will maintain its condition unless an outside force acts on it

Question 23

Static Equilibrium

Answer 23

No Motion

Question 24

Dynamic Equilibrium

Answer 24

Motion that is constant (Balanced Forces)

Question 25

Formula for Dynamic Equilibrium

Answer 25

Net Force (Fx or Fy)= 0 Newtons

Question 26

Formula for Static Equilibrium

Answer 26

Net Force (Fx or Fy)= 0 Newtons

Question 27

Newton's Second Law of Motion

Answer 27

Acceleration is directly proportional to the net force and indirectly proportional to the object's mass

Question 28

Accelerated Motion

Answer 28

``` Motion Changing(velocity) Unbalanced Forces ΣFx or Fy=Ma(xy) ```

Question 29

ΣFy=0 Newtons

Answer 29

ΣFy=Fn+(-Fg)+(-Fpy)

Question 30

Torque Formula

Answer 30

T | Units: Newtons*Meters (Nm)

Question 31

T=

Answer 31

Force crossed with radius

Question 32

The force and the radius must be _______ to each other or must have _______ components

Answer 32

Perpendicular

Question 33

Another way to express the radius would be a

Answer 33

Lever Arm

Question 34

I

Answer 34

Moment of Inertia (Mass Distribution)

Question 35

Inertia is the equivalent

Answer 35

Linear mass

Question 36

Units of Inertia

Answer 36

Kgm^2

Question 37

α

Answer 37

Alpha(Fishy)=Angular Accelerations

Question 38

Units of α

Answer 38

Radians/Seconds^2

Question 39

3 Conditions when calculating Torque

Answer 39

Static Equilibrium Dynamic Equilibrium Accelerated Motion

Question 40

How to draw a free body diagram

Answer 40

``` Identify Condition Identify Axes Vector Summation Set Condition=Vector Summation Mathematically Substitute and Solve ```