October 1, 2008 Blog.

Double Scribed : Say thanks. ;P

Today in class we were given time to finish the lab previously assigned on the 30th of September. The lab was supposed to be handed in by the end of class. (By the way, the last question on the lab is confusing but if you think about the recoil it'll be alot easier).

We also corrected the questions in the "Duck Book".

50.
Jf = J1 + J2.
= (1/2 ( 100 N [G])) + [100N [E] (15s)]
= 250N + 1500 N
= 1750 N. [E]

b)
A= 1/2bh
= 1/2 (4.0x10^-2 s ) ( 15 N )
= 0.3 Ns.

c)
A=1/2bh
= 1/2(5)(-10)
= -25 Ns.

A2 = bh
= 12.5(-10)
= -125 Ns.

A3 = 1/2bh
= 1/2 (10)(-10)
= 1/2 (-100)
= - 50 Ns.

At = A1+A2+A3
= -200 Ns.

51.

(1/2 x - 90 x .03) + (120 x 0.2 ) + (1/2 x 75 x 0.4)
= 25.5 N.

Other than that? We were given extra assignments to help us get practice on the topic impulse and momentum.

Assignments / Homework :

1. IMPULSE AND MOMENTUM hand-out.
2. Complete "9 Study Guide."

That's pretty much it for the class besides me, Benchman and Lawrence having an arguement/discussion about the lab.

The next blogger like I said in the previous post I made will be chosen tomorrow.