Question
The formula T=2π√L/480 can be used to find the period (T in seconds, the time it takes a pendulum to complete one cycle) of a pendulum that is L cm long.
(a)Rewrite this formula using rational exponents. Don't forget to rationalize the denominator.
(b)Solve the formula for L.
(a)Rewrite this formula using rational exponents. Don't forget to rationalize the denominator.
(b)Solve the formula for L.
Answers
bobpursley
I think you mistyped 980
T=2PI (L/980)^.5
to solve for L, square both sides first.
T=2PI (L/980)^.5
to solve for L, square both sides first.
a. T = 2pi*sqrt(L/980).
Square both sides:
T^2 = 4(pi)^2(L/980).
b. Multiply both sides by 980/4(pi)^2:
980T^2/4(pi)^2 = L.
Square both sides:
T^2 = 4(pi)^2(L/980).
b. Multiply both sides by 980/4(pi)^2:
980T^2/4(pi)^2 = L.
Thanks Henry and bobpursley for replying. Now the question makes sense :-)
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