continue with water flowing from cup

get a 3-liter bottlecap, clamp with a hose, make a u tube and observe pressure in a new bottle ... should be able to get an atmosphere or two

move on to observing bottle

Come into every class knowing these things from Physics I.:

• velocity is the rate of change of position
• acceleration is the rate of change of velocity
• change in velocity is the area beneath an accel vs. t graph
• velocity is the slope of a v vs. t graph
• change in position is the area beneath a v vs t graph
• acceleration is the slope of a v vs. t graph
•  
• F_net = m a
• `dW_net = Fnet * `ds
• `dW_net = `dKE
• PE = m g h if gravitational acceleration g is constant
• KE = .5 m v^2
• `dW_on = `dKE + `dPE
•  
• impulse = Fnet * `dt
• momentum = m v
• impulse = change in momentum

Assuming that every domino has a mass of 10 grams find the potential energy of a stack of 6 dominos.

By how much does the PE of the stack change if the top domino is removed and laid on the tabletop?

By how much does the PE of the stack change if the top five dominos are slid off the bottom domino and lowered to the tabletop, with the stack of 5 laid on the table top?

By how much does the PE of the stack change if the top domino is pushed off and drops to the tabletop?  What KE does it attain before striking the tabletop?  What will be its velocity just before striking the tabletop?

How much force would be necessary to support a column of water having diameter 1 cm and altitude 30 cm? 

If this force is spread over a circle of diameter 1 cm, then how much force is exerted per square centimeter?

If v = 2 m/s, h = 5 m and P = 100,000 N / m^2 then

• What is 1/2 rho v^2 + rho g h + P?

Assuming that this quantity does not change:

• If v remains at 2 m/s and h changes to 8 m, then what is P?
• If v changes to 1 m/s and h changes to 3 m then what is P?

Assuming initial vertical velocity 0 determine how long it took the water stream to fall to the ground (you have v0 = 0, accel = 9.8 m/s^2, and displacement from wherever you held the cup to the ground).

Determine from the horizontal displacement how fast the water was moving in the horizontal direction.  Assume constant horizontal velocity.

Find the velocity of the stream predicted by Bernoulli's Equation (assume no change in pressure, change in altitude is 9.5 cm and velocity at the water surface is zero).

Familiarize yourselves with Introductory Problem Set 5 problems 1-9.

Read the chapter in your text on Fluids.