Physics 1

Question 1

sin(theta)

Answer 1

opp/hyp

Question 2

cos(theta)

Answer 2

adj/hyp

Question 3

unit vector

Answer 3

special vector with magnitude of 1

Question 4

i^

Answer 4

x-axis

Question 5

j^

Answer 5

y-axis

Question 6

|A vector|

Answer 6

sqrt( (Ax)^2 + (Ay)^2 )

Question 7

A vector * B vector

Answer 7

|A vector||B vector|cos(theta)

Question 8

i^ * j^

Answer 8

0

Question 9

(A vector) * (B vector)

Answer 9

(Ax * Bx) + (Ay * By)

Question 10

______ components survive the dot product

Answer 10

parallel

Question 11

______ components survive the cross product

Answer 11

perpendicular

Question 12

Express Ax in terms of theta

Answer 12

Ax = Acos(theta)

Question 13

Express Ax in terms of phi

Answer 13

Ax = Asin(theta)

Question 14

Force

Answer 14

influence that has the potential to change an objects motion

Question 15

What is Gravity

Answer 15

non-contact force

Question 16

Normal Forces

Answer 16

always perpendicular to surfaces producing them

Question 17

Types of forces

Answer 17

Gravity, normal(support), friction, tension, applied forces

Question 18

Friction is always _____ to the surface

Answer 18

parallel

Question 19

Tension always _____ the rope

Answer 19

follows

Question 20

g=_____

Answer 20

acceleration due to gravity, 9.81 m/s^2

Question 21

Fg=____

Answer 21

m * g

Question 22

Newtons 1st Law of Motion

Answer 22

In the absence of a net external force, an object in motion stays constant

Question 23

Newtons 2ns Law of Motion (discrete)

Answer 23

Sigma F vector = m * acceleration vector

Question 24

Newtons 2ns Law of Motion

Answer 24

Sigma F vector = m * acceleration vector

Question 25

Newtons 2ns Law of Motion (continous)

Answer 25

Integral F vector = m * acceleration vector

Question 26

What is acceleration

Answer 26

Change in objects motion (speeding up/down or turning)

Question 27

Answer 27

Question 28

Answer 28

Question 29

Coupled Systems

Answer 29

2 or more objects are able to influence the motion of the others, they have the same acceleration

Question 30

Work =

Answer 30

F1 * delta X ; (1/2)KX^2

Question 31

Spring Force

Answer 31

Fs = -K * delta X ; Restorative

Question 32

Joule

Answer 32

J = N * m = kg * (m/s)^2 = mv^2

Question 33

Energy in =

Answer 33

+

Question 34

Energy out =

Answer 34

-

Question 35

Power

Answer 35

(delta W / delta t) / (delta E / delta t) / (J / s) = W(watt)

Question 36

Answer 36

Question 37

Gravity and Spring forces are...

Answer 37

conservative forces

Question 38

conservative forces

Answer 38

work done by or against conservative forces do not depend on the actual path, but only the endpoint

Question 39

ug

Answer 39

mg * delta y

Question 40

us

Answer 40

1/2 kx^2

Question 41

ki + ui + Wnc

Answer 41

kf + uf

Question 42

Law of conservation of Energy

Answer 42

Energy cannot be created nor destroyed but it can change forms

Question 43

Potential Energy

Answer 43

u

Question 44

W =

Answer 44

delta u (only true IF the force doing the work is conservative

Question 45

Answer 45

Question 46

Answer 46

Question 47

Answer 47