Benefits

• Large and sturdy set-up suitable for demonstration and lab courses as well
• Live data-logging system to measure the oscillations of both pendula at once

USB charger for Cobra4 Mobile-Link 2 and Wireless/USB-Link

Measuring tape, l = 2 m

Cobra4 Wireless/USB-Link incl. USB cable

Cobra4 Sensor-Unit Electricity, current ± 6A / voltage ± 30V

Electrol.capacitor10microF/35V,G1

Support rod, stainless steel, 500 mm

Support rod, stainless steel, 750 mm

Rod with hook

Weight holder,

Slotted weight, black, 10 g

Helical spring, 3 N/m

Pendulum with recorder connection

Connecting cord, 32 A, 1000 mm, red

Connecting cord, 32 A, 1000 mm, blue

PHYWE power supply, 230 V, DC: 0…12 V, 2 A / AC: 6 V, 12 V, 5 A

Software Cobra4 – multi-user licence

Right angle clamp expert

Bench clamp expert

Tasks

1. To determine the spring constant of the coupling spring.
2. To determine and to adjust the characteristic frequencies of the uncoupled pendula.
3. To determine the coupling factors for various coupling-lengths using a) the apparatus constant, b) the angular frequencies for “inphase”and “in opposite phase” vibration, c) the angular frequencies of the beatmode.
4. To check the linear relation between the square of the coupling lengths and a) the particular frequencies of the beat mode, b) the square of the frequency for “inopposite phase” vibration.
5. To determine the pendulum’s characteristic frequency from the vibrational modes with coupling and to compare this with the characteristic frequency of the uncoupled pendula.

What you can learn about

• Spiral spring
• Gravity pendulum
• Spring constant
• Torsional vibration
• Torque
• Beat
• Angular velocity
• Angular acceleration
• Characteristic frequency