Q1 a man lifts a 224 kg bucket from a well and does 67 kj, Ask an Expert

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Q1. A man lifts a 22.4 kg bucket from a well and does 6.7 kJ of work. The acceleration of gravity is 9.8 m/s2.How deep is the well? Assume that the speed of the bucket remains constant as it is lifted. Response in units of m

Q2. Consider the 618 N weights held by two cables shown below. The left-hand cable had tension T2 and makes an angle of 43? with the ceiling. The right-hand cable had tension T1 and makes an angle of 50? with the ceiling.

a) What is the tension in the cable labeled T1 slanted at an angle of 50??

Respond in units of N

b)What is the tension in the cable labelled T2 slanted at an angle of 43??

Reply in units of N

Q3. A diver 40 m deep in 10 degree Celcius fresh water exhales a 0.50-cm-diameter bubble. What is the bubble's diameter just as it reaches the surface of the lake, where the water temperature is 20 degrees Celcius? Assume that the air bubble is always in thermal equilibrium with the surrounding water.

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