Pendulum Lab

Controls

Pendulum A

String length 1.00 m Mass of bob 1.0 kg Pull-back angle 30°

Pendulum B show

String length 1.00 m Mass of bob 3.0 kg Pull-back angle 30°

Air resistance on

How thick the air is 0.15

#	P	L (m)	m (kg)	angle	air	T meas	T pred

Let them swing a few times, then press Record.

—

moving energy (KE) height energy (PE) energy at the start

measuredpredicted

A—2.01 s

B—2.01 s

T = 2π√(L ÷ g), g = 9.8 m/s². Notice what is missing from it.