Click the link below to download a video of Emma and her friends clapping.

**Make a graph** from this video to calculate the speed of sound.

Based on your graph, which student is having the hardest time keeping in time with the beat? How can you tell?

]]>IT”S FRIDAY!!!!!

Working with a buddy, try these two problems:

- Kinetic Energy to Oscillation
- Masses and Springs –
**TURN FRICTION OFF**when running this- What is the mass of the Red Mass?
- What is the mass of the Green Mass?
- What is the gravitational field strength on Planet X?

- What is the moment of inertia of the
**disk**? - What is the final angular velocity of the disk?
- What is the average angular acceleration while the rocket is firing?
- How long was the rocket firing for?
- What average
must have been applied to accelerate the disk?**torque** - What
was provided by the rocket motor?**force**

- Use the video and video analysis to show that angular (rotational) momentum is conserved (or not…)

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Skeletal Operations:

- Computer Assisted Knee Replacement
- Shoulder Replacement
- Foot Surgery – Plantar Repair
- Spinal Decompression
- Total Ankle Replacement
- Rotator Cuff Repair – not really the skeleton, but a part that protects the shoulder joint