Units

Question 1

C

Answer 1

Coulomb, Electric Charge

A s

Question 2

F

Answer 2

farad, Capacitance
A squared s^4/
(kg m^2)

Question 3

H

Answer 3

henry, inductance

kg m^2/(A^2 s^2)

Question 4

Hz

Answer 4

hertz, frequency

s^-1

Question 5

J

Answer 5

joule, energy and work

kg (m^2/s^2)

Question 6

N

Answer 6

Newton, Force

kg m/s^2

Question 7

Ω

Answer 7

Ohm, elec resistance

kg m^2/(A^2 s^2)

Question 8

Pa

Answer 8

Pascal, Pressure

kg/ (m s^2)

Question 9

T

Answer 9

Tesla, Magnetic field

kg/(A s^2)

Question 10

V

Answer 10

Volt, electric potential

kg m^2/(A s^3)

Question 11

W

Answer 11

Watt, power

kg m^2/s^3

Question 12

A

Answer 12

Ampere, unit of electric current

Question 13

cd

Answer 13

candela, luminous intensity

Question 14

sec θ

Answer 14

1/ cos θ = H/A

Question 15

csc θ

Answer 15

1/sin θ = H/O

Question 16

cot θ

Answer 16

1/tan θ = A/O

Question 17

Laws of Sine

Answer 17

Sin A/a = Sin B/b = Sin C/c

a/Sin A= b/Sin B = c/ Sin C

Question 18

Law of Cosines

Answer 18

c^2 = a^2 + b^2 − 2ab cos(C)

Question 19

Weight

Answer 19

m g

g= 9.81 m/sec^2

Question 20

Density

Answer 20

Mass/Volume kg/m^3

ρ = m/V

Question 21

Average Speed

Answer 21

distance/time = v

d/t

Question 22

Average Velocity

Answer 22

Displacement/ time = v

d/t

Question 23

Average acceleration

Answer 23

Change in velocity/time

Question 24

Frictional Force

Answer 24

Ff= u FN
If the object is not moving, you are dealing with static friction and it can have any value from zero up to u FN

If the object is sliding, then kinetic friction and it will be constant and equal to ukFN

Question 25

Torque

Answer 25

T = F * r * sinθ | Where θ ist he angel between F and L; unit : Nm

Question 26

Work

Answer 26

F D cos θ | D is the distance moved and θ is the angle between F and the direction of motion; unit J

Question 27

Power

Answer 27

``` rate of work done Power = Work/time Unit: Watt Efficiency = Work_out / Energy_ in Mechanical advantage = force out/force in ```

Question 28

Constant acceleration Linear Motion 5 equations

Answer 28

x, v, t, a, v_o

Question 29

Constant acceleration Linear Motion, missing x

Answer 29

v = v_o + at

Question 30

Constant acceleration Linear Motion, missing v

Answer 30

(x-x_o) = v_o t + 1/2a t^2

Question 31

Constant acceleration Linear Motion, missing t

Answer 31

v^2 = v_o^2 + 2a(x-x_o)

Question 32

Constant acceleration Linear Motion, missing a

Answer 32

(x-x_o) = 1/2 (v_o +v)t

Question 33

Constant acceleration Linear Motion, missing v_o

Answer 33

(x-x_o) = v t - 1/5at^2