Can anyone answer this for me? please (Question above this)

Question

The motion of a pendulum can be found using the formula  2=2pie R square root L/g , where T is the time in seconds L is the Length in centimeters, and G is the acceleration due to gravity (980cm/sec^2)

A.) Find the time in seconds that it takes a 50-cm pendulum to make one complete swing.

B.) Find the Length in centimeters of a pendulum that takes 5 seconds to make one complete swing.

Answer 1

me ges that equashun spozed tu be

time=2*pi*R *root(l/g)

????? wotz R ????

Answer 2

Should be T=2(pi)sqrt(L/g), for simple harmonic motion.

A) If L=50, T=2(pi)sqrt(50/980)=2(pi)sqrt(0.0510)=1.42 secs approx.

B) If T=5, L/g=25/4(pi)^2=0.6333, so L=620.6cm approx.