An ice skater spins with her arms outstretched at 1 revolution per second. She pulls her arms in toward her body. Does her angul
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Answer:
The coefficient of kinetic friction is 0.382.
Explanation:
Given:
Angle of inclination is, °
Mass of package is,
Initial speed of package is,
Final speed of the package at the bottom is,
Distance of travel along the incline is,
Acceleration due to gravity is,
Let the coefficient of kinetic friction be .
Now, the frictional force will be acting along the incline but in the direction opposite to the direction of motion.
So, the net acceleration acting on the package will be up the incline and is equal to:
----------------- 1
Now, using equation of motion, we have:
Solving for 'a', we get:
Now, plug in the value of 'a' in equation (1). This gives,
( Neglecting negative sign)
Plug in all the given values and solve for . This gives,
Therefore, the coefficient of kinetic friction is 0.382.