Chapter 1: Kinematics and Dynamics

Question 1

metric system

Answer 1

MKS

Question 2

lenght

Answer 2

meter (m)

Question 3

mass

Answer 3

kg

Question 4

time

Answer 4

second (s)

Question 5

current

Answer 5

ampere (A)

Question 6

amount of substance

Answer 6

mole (mol)

Question 7

newton

Answer 7

N or kg.m/s^2

Question 8

angstroms

Answer 8

1A = 10^-10m

Question 9

breaking each vector into perpendicular componentes

Answer 9

x- and y- componenmts

Question 9

nanometer

Answer 9

1nm = 10^-9 m

Question 10

vector addition

Answer 10

tip-to-tail

Question 10

electron-volts

Answer 10

1 eV = 1.6 x 10^-19 J

Question 11

x-component

Answer 11

X=V cosθ

Question 12

y-component

Answer 12

Y =V sinθ

Question 13

Pythagorean theorem

Answer 13

a^2 + b^2 = c^2

or c= square root of a2+b2

Question 14

vector subtraction

Answer 14

A - B = A + (-B)

pointing the other direction

Question 15

multipling vectors by scalars

Answer 15

B = nA

to determine the direction of B, if n is a positive number then B is pointing at the same direction of A but if n is negative number, then B is pointing in the opposite direction of A

Question 15

displacement (x or d)

Answer 15

vector quantity, does not account for pathway

Question 16

multiplying vectors by other vectors

Answer 16

to generate a scalar quantity, we use the dot ptoduct:

A . B = A B cosθ

to generate a vector qauntity, we use the cross product:

A x B = A B sinθ

is it notcommutative (A x B ≠ B x A)

Question 17

distance (d)

Answer 17

considers pathway and is a scalar quantity

Question 18

up and down signs

Answer 18

up is positive and down is negative

Question 18

universal gravitational force

Answer 18

Fg = G m1 m2 / r^2

G = 6.67 x 10^-11 N . m^2 / kg ^2

Question 19

earth’s surface gravity

Answer 19

10 m/s^2

always have a direction

Question 20

sin 90 =

Answer 20

1

Question 21

sin 0 =

Answer 21

0

Question 22

average velocity

Answer 22

v = Δx / Δt

Question 23

kinetic friction

Answer 23

fk = μk N

Question 24

static friction

Answer 24

0 < fs < μs N

Question 25

newton's first law

Answer 25

Fnet = m a = 0 object will remian at rest or move with a constant velocity if there is no net force on the object

Question 25

average acceleration

Answer 25

a = Δv / Δt

Question 26

newton's second law

Answer 26

Fnet = m a any acceleration is the result of the sum of the forces acting on the objet and its mass

Question 27

newton's third law

Answer 27

Fab = -Fba any two objects interacting with one another experience equal and opposite forces as a result of their interaction

Question 28

kinematic (no displacement)

Answer 28

v = v {0}+ at v {0} = initial velocity

Question 29

kinematic ( no final velocity)

Answer 29

x = v {0} t + at^2 / 2

Question 29

kinematic (no time)

Answer 29

v^2 = v {0}^2 + 2ax

Question 30

kinematic (no acceleration)

Answer 30

x = vt

Question 31

components of gravity on an inclined plane

Answer 31

Fgx = mg sinθ Fgy = mg cosθ

Question 32

torque

Answer 32

t = r x F = rF sinθ

Question 33

centripetal force

Answer 33

Fc = mv^2 / r

Question 34

linear motion

Answer 34

free fall

Question 35

rotational equilibrium

Answer 35

absence of any net torque