Homework Help: physics

Posted by Nuwaya on Monday, January 16, 2012 at 6:53am.

A simple pendulum is made from a bob of mass 0.04 kg suspended on alight string of length 1.4m. Keeping the string taut, the pendulum is pulled to one side until it has gained a height of 0.1m. calculate:
a. The total energy of the oscillation
(b) the amplitude of the resulting oscillation
(c) the period of the resulting oscillation
(d) the maximum velocity of the bob
(e) the maximum kinetic energy of the bob

physics - drwls, Monday, January 16, 2012 at 7:24am
(a) M g H, where H = 0.1 m, M = mass and g = acceleration of gravity
(b) If amplitude (A) is the maximum horizontal displacement, then
A = sqrt[1.4^2 - 1.3^2] = 0.52 m
(c) (2 pi)*sqrt(L/g)
where L = 1.4 m
(d) A*sqrt(g/L)
(e) M g H (same as maximum energy)

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