1.A raindrop of mass 3.43 10-5 kg falls vertically at constant speed under the influence of gravity and air resistance. Model the drop as a particle. (a) As it falls 60 m, what is the work done on the raindrop by the gravitational force? J (b) What is the work done on the raindrop by air resistance? J
1.A raindrop of mass 3.43 10-5 kg falls vertically at constant speed under the influence of gravity and air resistance. Model the drop as a particle. (a) As it falls 60 m, what is the work done on the raindrop by the gravitational force? J (b) What is the work done on the raindrop by air resistance? J
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1.A raindrop of mass 3.43 10-5 kg falls vertically at constant speed under the influence of gravity and air resistance. Model the drop as a particle.
(a) As it falls 60 m, what is the work done on the raindrop by the gravitational force?
J
(b) What is the work done on the raindrop by air resistance?
J
J
(b) What is the work done on the raindrop by air resistance?
J
2.Spiderman, whose mass is 78.0 kg, is dangling on the free end of a 11.4-m-long rope, the other end of which is fixed to a tree limb above. By repeatedly bending at the waist, he is able to get the rope in motion, eventually getting it to swing enough that he can reach a ledge when the rope makes a ? = 58.6° angle with the vertical. How much work was done by the gravitational force on Spiderman in this maneuver?
kJ
kJ
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