1. [0/20 Points] DETAILS PREVIOUS ANSWERS SERPSE10 7.2.OP.001. A raindrop of mass 3.24 x 10"kg falls vertically at constant speed under the influence of gravity and air resistance. Model the drop as a particle. (a) As it falls 50 m, what is the work done on the raindrop by the gravitational force? 158.76*10^-4 x Your answer cannot be understood or graded. More Information ] (b) What is the work done on the raindrop by air resistance? 0 The speed of the drop remains constant, but that does not mean the work done by each individual force will be zero. J Need Help? Read It Watch It5. [13.34/20 Points] DETAILS PREVIOUS ANSWERS SERPSE10 7.8.OP.027. A particle is acted on by a conservative force, F = (-Ax + x*)i N, where A and B are constants, and x is in meters. (For your answers, use the following as necessary: A, B, and x.) (a) Determine the potential energy function (in ]) for F, where U = 0 at x = 0. 2 U(x) = 2 - Bx X Use the equation relating the change in potential energy to the conservative force acting on the particle: AU = F dx, and note that U; = 0. J (b) Determine the change in potential energy (in ]) as the particle moves from x = 1.40 m to x = 4.00 m. AU = 7.02 A - 2339.065 B (c) Determine the change in kinetic energy (in ]) as the particle moves from x = 1.40 m to x = 4.00 m. AK = -7.024 + 2339.06 B