Q1 from a cliff that is 94 m above a lake a young woman, Ask an Expert

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Q1. From a cliff that is 9.4 m above a lake, a young woman (mass 44 kg) jumps from rest, straight down into the water. At the instant she strikes the water, what is her de Broglie wavelength?

Q2. A train is moving along a track with constant speed relative to the ground. A person on the train holds a ball of mass and throws it toward the front of the train with a speed relative to the train.

a) Calculate the change in kinetic energy of the ball in the Earth frame of reference.

State the answer in terms of variables

b) Calculate the change in kinetic energy of the ball in the train frame of reference.

Express the answer in terms of variables

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