A 119 kg seal at an amusement park slides from rest down a ramp into the pool below. The top of the ramp is 1.95 m higher than the surface of the water and the ramp is inclined at an angle of 26.5° above the horizontal. Part A If the seal reaches the water with a speed of 4.55 m/s, what is the work done by kinetic friction? Express your answer using three significant figures. Temglates Symbola undo' redo teset keyboard shortcuts Heip J Submit RequestAnswer Part B What is the coefficient of kinetic friction between the seal and the ramp? Templates Symdols undo rego teset keyboard shortcuts Help

Part A A spring of force constant 240.0 N/m and unstretched length 0.220 m is stretched by two forces, pulling in opposite directions at opposite ends of the spring, that increase to 15.0 N. How long will the spring now be? Express your answer in meters. V ΑΣφ m = 1 Submit Request Answer Part B How much work was required to stretch it that distance? Express your answer in joules.

Ayoung woman on a skateboard is pulled by a rope attached to a bicycle. The velocity of the skateboarder is v = (4.6 m/s )ê and the force exerted on her by the rope is F = (17 N)â + (12 N)ỹ. Part A Find the work done on the skateboarder by the rope in 25 seconds. Express your answer using two significant figures. ? W = J Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Review your calculations and make sure you round to 2 significant figures in the last step. Part B Assuming the velocity of the bike is the same as that of the skateboarder, find the work the rope does on the bicycle in 25 seconds. Express your answer using two significant figures. Πνα ΑΣφ ? W = J

A 23.3-kg child descends a slide 3.4 m high and reaches the bottom with a speed of 1.9 m/s. Part A How much thermal energy due to friction was generated in this process? Express your answer using two significant figures.