A2L Item 271

• Description:
• Goal:
• Source:
• Keywords: Acceleration, Displacement, Dynamics, Forces, Gravity, Mechanics, Problem Solving, Velocity

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The question for students:

Jane is riding in a hot air balloon that is rising vertically at a constant speed of 3 m/s over a lake. She drops a rock from the balloon when the distance from the rock to the water is 50 m. Use g=10 m/s², and let up be the positive direction. What is the initial velocity of the rock?

1. 3 m/s
2. -3 m/s
3. 0
4. Cannot be determined.
5. None of the above.

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Commentary for teachers:

No commentary available.

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