College Physics
Solutions
College Physics
A student of mass 60.0 kg, starting at rest, slides down a slide 20.0 m long, tilted at an angle of 30.0° with respect to the horizontal. If the coefficient of kinetic friction between the student and the slide is 0.120, find (a) the force of kinetic friction, (b) the acceleration, and (c) the speed she is traveling when she reaches the bottom of the slide.
(a)
Given Info: Length of the incline is 20 m. Mass of the student is 60.0 kg. Angle of inclination is
Formula for kinetic friction is,
-
- N is the normal force.
The free body diagram is given below.
From the above diagram,
- m is the mass of the student.
- g is the acceleration due to gravity.
-
Substitute
Substitute 0
(b)
(c)
Chapter 4 Solutions
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