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1. You throw a ball from the top of a 50 m high building at 12...

1. You throw a ball from the top of a 50 m high building at 12 m/s straight upward. The ball misses the building on the way down. The mass of the ball is 2 kg.

Using energy considerations, how high does the ball go?

Using energy considerations, what is the magnitude of the velocity just as it strikes the ground?

What is the work done by the force of gravity on the ball while the ball is traveling upward?

What is the total work done by the force of gravity on the ball?

2. You throw a ball, m = 2 kg, with an initial velocity of 20 m/s at an angle of 60 degrees from the top of a 30 m cliff.

Using energy considerations, what is the magnitude of the velocity when it hits the ground?

What is the total mechanical energy in this system?

What if I change the angle to 50 degrees; does this change your answers?

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