Homework Help: Physics

Posted by Tara on Tuesday, January 11, 2011 at 7:50pm.

Original Question:
A block hangs in equilibrium from a vertical spring. When a second identical block is added, the original block sags by 5.00 cm. What is the oscillation frequency of the two block system?

bobpursley s'ltn:
F=kx = mg

x=mg/k
but for the second block we have

x+.05=2mg/k

setting the x equal..

mg/k-2mg/k=-.05
-mg/k=-.05
k= mg/.05

now frequency:

f= 1/2pi sqrt (k/m)

put that k int the expression, and you have the answer

Okay bob, I did that and got 0.112 when my calculator was in degrees, but I know it needs to be in radians. So I got 21.99 when my calculator was in radians. I think I may just be entering it into my calculator incorrectly.

Physics - Tara, Tuesday, January 11, 2011 at 7:52pm
When I initially did it I got 2.23Hz.. which was also incorrect.

Answer this Question

Related Questions

Physics - A block hangs in equilibrium from a vertical spring. When a second ...
physics - A block with mass m =7.3 kg is hung from a vertical spring. When the ...
Physics - A block has mass 800 g, whose is fasten to a spring with spring ...
physics - A 390.0 g block is dropped onto a vertical spring with a spring ...
Physics - A 100-g block hangs from a spring with k = 5.3 N/m. At t = 0 s, the ...
Physics - A 0.400 kg block of wood hangs from the ceiling by a string, and a 0....
Physics - Block A and block B (see figure below) are forced together, ...
Physics - A 0.400 kg block of wood hangs from the ceiling by a string, and a 0....
Physics - A 5.00 kg carrying a charge of Q=60 uC is connected to a spring for ...
Physics - A 5.00 kg carrying a charge of Q=60 uC is connected to a spring for ...

For Further Reading

First Name:
School Subject:
Answer: