Unit 2 - Dynamics

Question 1

What is contact force

Answer 1

a force that needs direct contact (A push)

Question 2

What is ranged force

Answer 2

A force that works without contact (Gravity)

Question 3

is contact force = ranged force

Answer 3

No, they’re opposite

Question 4

Definition of mass

Answer 4

Amount of matter

Question 5

SI unit for mass

Answer 5

Kg

Question 6

Definition of weight

Answer 6

Gravitational force

Question 7

SI unit for weight

Answer 7

N (newton)

Question 8

Definition for volume

Answer 8

How much space x takes up

Question 9

SI unit for volume

Answer 9

m^3

Question 10

Definition for density

Answer 10

m/V

Question 11

SI unit for density

Answer 11

Kg / m^3

Question 12

what it Fg

Answer 12

Gravitational force

Question 13

What is the SI unit for gravitational force

Answer 13

N

Question 14

what is the resultant

Answer 14

the amount of displacement

Question 15

What is the definition of Equilibrant

Answer 15

180(degrees) different than the resultant

Question 16

What does tan^-1 get you

Answer 16

the angle if you have both opposite and adjacent side lengths

Question 17

What is the equation for center of mass when you have an even distribution of mass

Answer 17

Xcm = (ΣmiXi) / (Σmi)

Question 18

What is the equation for center of mass with even distribution of mass when you don’t have numbers

Answer 18

Xcm = (1/M) ∫xdm

Question 19

what is M

Answer 19

M = total mass

Question 20

what is M = to?

Answer 20

M = ∫dm = λl

Question 21

What is the equation for linear density

Answer 21

λ = M / (l [total length]) = dm / dx

Question 22

What is λ

Answer 22

λ = M / (l [total length]) = dm / dx

Question 23

What is dm / dx

Answer 23

Linear mass density

Question 24

What is ∫dm

Answer 24

the total mass of an object or system

Question 25

Whats Newton's 1st law

Answer 25

If ΣF = 0, velocity is constant

Question 26

Whats Newton's 2nd law

Answer 26

ΣF = F(net) = ma

Question 27

Whats Newton's 3rd law

Answer 27

Every action has an equal and opposite reaction

Question 28

Do the forces cancel out when 2 equal forces are acting on 2 separate objects

Answer 28

No

Question 29

What is Fg

Answer 29

m/g the force of gravity on an object

Question 30

If an object has 2 ropes pulling on either side of it, and it is moving to the right which rope has a higher tension

Answer 30

The right rope because it is moving to the right

Question 31

What is the equation to find a for a modded atwood machine

Answer 31

(m1 + m2) / (m1 * g)

Question 32

What is the equation to find F(T)

Answer 32

a * (total mass)

Question 33

what is the equation for time

Answer 33

√(2h/g)

Question 34

What is the equation for the Force of kinetic friction

Answer 34

μ(k) * F(N)

Question 35

What is the equation for the Force of static friction

Answer 35

μ(s) * F(N)

Question 36

If frictional force parallel or perpendicular to normal force

Answer 36

Perpendicular

Question 37

What is the equation for μ(k)

Answer 37

(F(f)) / (F(N))

Question 38

What is the equation for spring force (F(s))

Answer 38

Kx

Question 39

What is another name for an ideal spring

Answer 39

A Hookean spring

Question 40

what is m'

Answer 40

partial mass

Question 41

what is the equation for m'

Answer 41

ρ(4/3) π(r')^3 OR ((Mρ) / (R^3)) r^3

Question 42

what is r'

Answer 42

The distance from the center of mass to the of the sphere

Question 43

What is the equation for ρ

Answer 43

M/V = (M) / ((4/3)π(r')^3)

Question 44

What is ρ

Answer 44

The density of the sphere

Question 45

What does centripetal mean

Answer 45

towards the center

Question 46

What does centrifugal mean

Answer 46

away from the center

Question 47

What does UCM mean

Answer 47

Uniform circular motion

Question 48

What is the equation for a(c)

Answer 48

(v^2) / r

Question 49

What is the equation for v

Answer 49

√(m(s)*Rg)

Question 50

What is the equation for F(s)

Answer 50

-Kx

Question 51

What is K

Answer 51

The spring constant

Question 52

is K (-) or (+)

Answer 52

K is always (+)