# CENCO® AP Physics Lab 7: Conservation of momentum - Ballistic Pendulum

The Ballistic Pendulum Lab is a classic experiment that determines conservation of energy and angular momentum.

• Multiple Launching Positions
• Extraction Device for Ball
• Students Determine the Initial Velocity of the Marble
• Purpose for Students: to Practice Trigonometry, Kinematics, and Angular Momentum Formulas
Teachers show conservation of momentum by launching a ball into a pendulum. The height to which the pendulum increases is directly proportional to the marble’s initial energy. This offers students an opportunity to use trigonometry, kinematics, and angular momentum formulas to determine the initial velocity of the marble. A photogate measures the actual velocity of the marble to provide the lab with an alternate method of determining energy. Students can conduct the lab both ways and compare the two results.

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Ordering information: The kit includes a ballistic pendulum, two 50 N spring scales, metric ruler, cord, stopwatch, and caliper. A triple beam balance and meter stick are required but not provided. A force probe can be used instead of the spring scales.

## ORDER

Lab
Item # Description For Use With Unit Availability Price Quantity
470018-124 CENCO AP Physics Lab 7: Conservation of momentum - Ballistic Pendulum
1 Lab group Kit of 1 Retrieving

Meter Stick for Lab
Item # Description Unit Availability Price Quantity
470046-332 Hardwood Meter Stick with Plain Ends
Each Retrieving

## ACCESSORIES

Accessories
Item # Description Unit Availability Price Quantity
470002-950 Vernier Low-g Accelerometer
Each Retrieving

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