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You throw a ball, m = 2kg, with an initial velocity of 20 m/s at an...

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

a. using energy considerations, what is the magnitude of the velocity when it hits the ground?

b. what is the total mechanical energy in this system?

c. what if I change the angle to 50 degrees; does this change your answers?

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