Okay, to begin with, I'll set the lab up for you. Apparently this is a pretty common lab, so I imagine most of you are familiar with it - I think I've heard it called a coffee-cup calorimeter lab before. I am to perform three reactions:
Reaction 1: Dissolve 1 tbsp (5.5) solid sodium hydroxide...
Okay, here's the question exactly as shown in the book:
Consider the frictionless roller coaster shown in Figure 5.11.
(see attached image)
If a 12000-kg car starts at rest from point A, calculate
a) the total energy of the system
[finished this, no problems]
b)the speed of the...
I don't have much of a problem with b); I use the equation
Ep{A} = Ek{B}
and proceed,
mgh{A} = 0.5mv{B}^2
v(B) = (2gh{A})^0.5
v{B} = 43.2 m/s
With the final velocity obtained,
Ek{B} = 0.5mv{B}
Ek{B} = 1.1 * 10^7 J
I can't seem to do anything with this answer to help me with a), though...
The question:
(I am given a diagram; I'll attempt to describe it here.)
Consider a frictionless, 12000-kg roller coaster that starts at rest at the top of a hill, point A, 95 m high. It goes all the way down the hill and coasts horizontally (for an unspecified distance) before reaching point...
*ahem*
A box with a mass of 22 kg is at rest on a ramp inclined at 45 deg to the horizontal. The coefficients of friction between the box and the ramp are \mu_S = 0.78 and \mu_K = 0.65.
a) Determine the magnitude of the largest force that can be applied upward, parallel to the ramp, if the...
Just as a bit of background: I'm taking a Grade 12 Uni prep correspondence course, and not only do the notebooks not explain the subjects NEARLY well enough, my teacher lives an hour away and I'd be lucky to see her once a week.
That being said, here's the question:
A small box is resting on a...