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Q1. A 2.10kg snowball is fired from a cliff 8.55 m high with an initial velocity of 11.90 m/s, directed 47.0° above the horizontal. (a) Using energy techniques, find speed of the snowball as it reaches the ground below the cliff. What is that speed (b) if launch angle is changed to 47.0° below the horizontal and (c) if mass is changed to 4.73 kg?

Q2. A 148N bird feeder is supported by three cables (left cable has angle of 60 degrees, right cable has angle of 30 degrees, bird feeder is hanging vertically). Find out the tension in each Right cable and left cable.

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