Author Question: A simple pendulum, 2.6 m in length, is released with a push when the support string is at an angle ... (Read 68 times)

sdfghj · **on:** Jul 28, 2018

A simple pendulum, 2.6 m in length, is released with a push when the support string is at an angle of 45.0 from the vertical. If the initial speed of the suspended mass is 1.25 m/s when at the release point, what is its speed at the bottom of the swing? (g = 9.8 m/s2)
a. 4.1 m/s
b. 3.9 m/s
c. 4.1 m/s
d. 16 m/s
e. 7.2 m/s

Question 2

A pendulum consists of a mass m suspended from a string of length L. When the pendulum is swinging, how much greater is the mass's potential energy when the string is displaced from the vertical by the angle than when the mass is at the lowest position?
a. mgLsin
b. mgLcos
c. mgL(1 sin) d. mgL(1 cos)