A resting pendulum of length L=72 cm with a bob of mass m=0.02 kg is suddenly pushed by a fan causing a constant force F

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A resting pendulum of length L=72 cm with a bob of mass m=0.02kg is suddenly pushed by a fan causing a constant force F=7.1 N.The pendulum comes to rest at an angle θf=θ=41°. Determine thetotal work done on the bob.
An m=60 kg diver jumps off a diving board h=3 m above the waterthat acts like an ideal spring with k=1.2 kN/m after being bent atotal of y=50 cm. How far below the water does the diver reachwithout swimming if the resistance force of the water is a constantR=30 N and they are at a θ=25° from the vertical angle? Ignore airresistance.