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What are the units for the following?
1. Length
2. Mass
3. Force
4. Time
5. Work and Energy
6. Power
1. Meter (m)
2. Kilogram (kg)
3. Newton (N) = kg*m/s2
4. Second (s)
5. Joule (J) = N*m = kg*m2/s2=W*s
6. Watt (W)= J/s = N*m/s = kg*m2/s3
Give the exponential value for each of the following:
1. Giga (G)
2. Mega (M)
3. Kilo (k)
4. Centi (c)
5. Milli (m)
6. Micro (μ)
7. Nano (n)
8. Pico (p)
1. 109
2. 106
3. 103
4. 10-2
5. 10-3
6. 10-6
7. 10-9
8. 10-12
What are the sin and cos values for the following angles?
1. 0°
2. 30°
3. 45°
4. 60°
5. 90°
6. 180°
cos_______sin
1. 1               0  
2. √3/2          1/2
3. √2/2          √2/2
4. 1/2            √3/2
5. 0               1
6. -1              0
1.What is the difference between a scalar quantity and a vector quantity?

2. Which of the following are scalar or vector quantities?


  • distance, speed, mass

  • displacement, velocity, and force

1. Scalar quantities have magnitude but no direction, vector quantities have magnitude and direction.

2.



  • distance, mass, speed are scalar

  • displacement, velocity, force are vector


1. (T/F) Sum of two vectors is the resultant vector
2. A person walks 2 mi. north, turns around walks 3 mi. south, tot. elapsed time: 1 hour


  • distance(d) =

  • displacement (Δx) =

  • average velocity (v)=

  • average speed (s) =



1. True
2.


  • d= 5 mi.

  • Δx = 1 mi. south

  • v = Δx/Δt = 1 mi/hour south

  • s = d/Δt = 5 mi/hour

1. average acceleration (a) =
2. for body under constant acceleration:
  • v =
  • Δx =
  • v2 =
  • v =
1.  a = Δv/Δt
2.
  • v = v0 + at
  • Δx = v0t + at2/2 = vt = (v0 + v)t/2
  • v2 = v02 + 2a(x-x0)
  • v = (v0 + v)/2
1. What are the formulas for initial horizontal and vertical velocities for a projectile launched w/ speed v at an angle of Θ to the horizontal?

2. What does the total horizontal distance, x, traveled by a projectile equal?
1. horizontal: vcosΘ, vertical: vsinΘ

2. x = vcosΘ*t
What are Netwon's Three Laws of Motion?
1. A body in motion w/ constant velocity in a straight line path or at rest will remain that way unless a net force acts upon it.


2. Force = (mass)(acceleration) = ma


3. For every force there is an equal and opposite force.
1. Is weight a vector or scalar quantity?

2. What is the formula for calculating weight?
1. weight is a vector quantity

2. weight = (mass)(gravity) = mg
1.What is the formula for gravitational force?

2. If distance between two objects is doubled , how much is the force of gravity increased/decreased?
1. F = (Gm1m2)/r2

2. Decreased by a factor of 4.
(T/F) A body in translational equilibrium has a net force moving it at a constant velocity?
False. a body in translational equilibrium has not net force acting on it.
1. what is the formula for calculating torque (τ)

2. In calculating torque, which rotation direction is considered positive or negative?

3. If a lever arm is halved, how does the torque increase/decrease?
1. τ=rFsinØ, r = distance b/t F and axis of rotation

2. CCW is positive, CW is negative.

3. torque decreases by half
(T/F) For rotational equilibrium to occur the sum of all torques acting on a body must be zero.
True.
What is translational motion?
Motion in which the position of an object's center of mass changes as a function of time.
what is the formula for the force of static friction?
fs ≤ μsN
μs = coefficient of static friction
what is the formula for the force of kinetic friction?
fk = μkN
μk = coefficient of kinetic friction
what is the formula for centripetal acceleration (body in uniform circular motion)
a = v2/r
what is the formula for centripetal force (body in uniform circular motion)?
F = mv2/r
(T/F) For a planet orbiting a star, the centripetal force is equal to the gravitational force.
True.
1. What is the formula for work(W)?

2. What is the unit for work(W)?
1. W = FdcosØ

2. Joule = N*m = kg*m2/s2
1. What is the formula for Power(P)?

2. What is the unit for Power(P)?
1. P = W/t

2. Watt = Joule/sec = N*m/sec
What is the formula for kinetic energy (KE)?
KE = 1/2*mv2
What is the formula for gravitational potential energy(U)?
U = (mass)(gravity)(height)= mgh
1. (T/F) The total mechanical energy of a body is the sum of its kinetic and potential energies.

2.  Is total mechanical energy a constant if the only forces that act on a body are conservative (E = K+U)?

3. What is the change in a energy of a system if only conservative forces act on it?
1. True

2. Yes, E = K +U is constant

3. ΔE = 0
What is the formula for momentum (p)?
p = (mass)(velocity) = mv
What is the formula for Impulse (J)?
J = Ft = m(v-v0) = Δp
Is kinetic energy completely conserved in a completely elastic collision?
Yes.
(T/F) Net external force must equal zero for conservation of momentum to occur.
True
What is the formula for center of mass for two masses, m1 and m2, lying along x-axis at x1 and x2?
X = (m1x1 + m2x2)/(m1+m2)
(T/F) Momentum is not conserved in an inelastic collision.
False, momentum is conserved in elastic and inelastic collisions.
What are the temperatures in Kelvin and Celsius for the following:

1.Absolute zero
2. Freezing Point of Water
3. Boiling Point of Water
Kelvin          °Celsius
1. 0            -273
2. 273          0
3. 373          100
What is the formula for converting Kelvin to Celsius?
Tc=Tk-273
What is the formula for thermal expansion of a solid?
ΔL = αLΔT
α = coefficient of linear expansion

What is the formula for volume thermal expansion of a liquid or a solid?
ΔV = βVΔT
β = coefficient of volume expansion
Heat transfer involving direct transfer of energy form molecule to molecule through molecular collisions.
Conduction
Heat transfer involving transfer of energy  by electromagnetic waves.
Radiation
Heat transfer involving physical motion of heated materials.
Convection
What are the units of heat?

calories, Btu, or Joule
What is the difference between a calorie and a Calorie?
a Calorie is a nutritional term equal to 1000 calories.
What is the formula for relating heat gained and temperature change?
Q = mcΔT = (mass)(sp. heat)(ΔT)
What is the heat of fusion?
amount of energy required for phase change from solid to liquid.
What is the heat of vaporization?
amount of energy required for a phase change from liquid to gas.
What is the formula for relating heat gained or lost during a phase change?
Q = (mass)(heat of transformation) = mL
What is the SI unit for pressure?
Pascal (Pa)
What is an isobaric process?
process done at constant pressure
What is the formula for work (given an isobaric process)?
W = PΔV = (pressure)(Δvolume)
What is the formula for the First Law of Thermodynamics?
ΔU = heat energy gained - work done by system = Q - W
(T/F) Heat flow out of a system is (+) and heat flow into a system is (-).
False, Heat flow out of a system is (-) and heat flow into a system is (+).
What is an adiabatic process?
process in which no heat flows from the system to its surroundings (or vice versa)
What is the 2nd Law of Thermodynamics?
Entropy of a closed system will either increase or remain unchanged.
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