Sliding down incline with friction

AI Thread Summary
A 44.9-kg seal slides down a 1.80 m high ramp inclined at 33.9°, reaching the water at a speed of 4.51 m/s. The discussion focuses on calculating the work done by kinetic friction and determining the coefficient of kinetic friction. A free body diagram was created to analyze the forces acting on the seal, but participants are struggling to connect the variables and find the necessary formulas. The relationship between potential energy at the top and kinetic energy at the bottom is also considered, particularly how friction affects the total energy during the slide. The conversation emphasizes the need for a clear method to derive the work done by friction and the coefficient of kinetic friction.
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A 44.9-kg seal at an amusement park slides from rest down a ramp into the pool below. The top of the ramp is 1.80 m higher than the surface of the water and the ramp is inclined at an angle of 33.9° above the horizontal. If the seal reaches the water with a speed of 4.51 m/s, what is the work done by kinetic friction?

What is the coefficient of kinetic friction between the seal and the ramp?





i set up a freebody diagram and drew all the forces that would be acting on the seal and listed the known variables, but i can't seem to find a way to connect them all together or find a formula to use to find the work done by kinetic friction or the coefficient of kinetic friction
 
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alan_g said:
A 44.9-kg seal at an amusement park slides from rest down a ramp into the pool below. The top of the ramp is 1.80 m higher than the surface of the water and the ramp is inclined at an angle of 33.9° above the horizontal. If the seal reaches the water with a speed of 4.51 m/s, what is the work done by kinetic friction?

What is the coefficient of kinetic friction between the seal and the ramp?





i set up a freebody diagram and drew all the forces that would be acting on the seal and listed the known variables, but i can't seem to find a way to connect them all together or find a formula to use to find the work done by kinetic friction or the coefficient of kinetic friction

If there were no friction, what could you say about the starting potential energy PE and the final kinetic energy KE? Since there is work done by friction while the slimy seal slides, how will that affect the KE+PE total throughout the slide?
 

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