Homework Help: physics

Posted by anonymous on Friday, December 25, 2009 at 11:13am.

Q.1.Find the total mechanical energy in one time period? my sir says that it is (1/2)mw^2A^2 but according to me it should be 1/4mw^2A^2.How?
Q.2.The total mechnical energy of a spring mass system in SHM is E = (1/2)mw^2A^2.Suppose the oscillating particle is replaced by another particle of double the mass while the amplitude A remains the same. The new mechanical energy will be?

physics - drwls, Friday, December 25, 2009 at 2:30pm
Q1. w^2A^2 = V^2 at maximum velocity. At that time, all energy is KE, and equals
(1/2)mw^2A^2

Q2. Total energy is proportional to mass. But w is inversely proportional to sqrt(mass). Therefore E stays the same, if A is constant.

Answer this Question

Related Questions

Physics - Physics Question Help please!!!? A 3.70 kg mass attached to a spring ...
physics - A 1.50 kg mass attached to a spring oscillates with a period of 0.365 ...
Physics - A 2.20 kg mass attached to a spring oscillates with a period of 0.440 ...
Physics - A 2.20 kg mass attached to a spring oscillates with a period of 0.440 ...
Physics - A 1.55 kg mass attached to a spring oscillates with a period of 0.375 ...
Physics - A 1.55 kg mass attached to a spring oscillates with a period of 0.375 ...
Physics - A 1.55 kg mass attached to a spring oscillates with a period of 0.375 ...
physics (3 separate questions) - 1. The motion of a body is described by the ...
physics - Refer to the equation you derived in exercise (4). Assume that 1 y = 0...
physics - A 2.48-kg rock is released from rest at a height of 28.1 m. Ignore air...

For Further Reading

First Name:
School Subject:
Answer: