Chapter 1: Kinematics and Dynamics

Question 1

Units for Mass

Answer 1

kilogram, blob ((lbs^2)/in), slug ((lbs^2)/ft)

Question 2

Units for Force

Answer 2

Newton (kg(m/s^2)), dyne (g(cm/s^2))

Question 3

Units for Work and Energy

Answer 3

Joules (kg(m^2/s^2)), erg (g(cm^2/s^2)), foots*lb

Question 4

Units for Power

Answer 4

Watts or Joule/second (kg(m^2/s^3)), erg/second (g(cm^2/s^3), (ft*lb)/second

Question 5

Angstrom

Answer 5

1 Angstrom = 10^-10 meters

Question 6

Electron-Volts (eV)

Answer 6

1 eV = 1.6 * 10^-19 Joules

Question 7

X- Component of Vector

Answer 7

x = V*cos (theta)

Question 8

Y- Component of Vector

Answer 8

y = V*sin (theta)

Question 9

Dot product

Answer 9

For scalar quantities

A dot B = lAl lBl cos (theta)

*Order does not matter

Question 10

Cross Product

Answer 10

For vector quantities

A * B = lAl lBl sin (theta)

***Order matters!!

Right hand rule
A -> Thumb
B -> Fingers
A*B (new vector) -> Palm

Question 11

Vector Subtraction

Answer 11

A-B = A + (-B)

Question 12

Multiplying Vectors

Answer 12

B = n * A

Magnitude and direction matter