Phyiscs help 3
posted by kelsey .
The height of a tower is measured by attaching a simple pendulum to its ceiling, whose length is barely enough to stay off the floor. The pendulum is let go from a small angle, and takes 13 s to return to the same location it started from.
a.) How tall is the tower?
? m
If the pendulum mass is let go 0.1 m above the floor,
b.)how fast is the mass travelling as it grazes the floor?
? m/s

These are incredibly simple to work. What is your difficulty?