Solution Found!
Solved: A 5.00-kg package slides 1.50 m down a long amp
Chapter 6, Problem 68P(choose chapter or problem)
Problem 68P
A 5.00-kg package slides 1.50 m down a long amp that is inclined at 24.0° below the horizontal. The coefficient of kinetic friction between the package and the ramp is μk = 0.310 Calculate (a) the work done on the package by friction; (b) the work done on the package by gravity; (c) the work done on the package by the normal force; (d) the total work done on the package. (e) If the package has a speed of 2.20 m/s at the top of the ramp, what is its speed after sliding 1.50 m down the ramp?
Questions & Answers
QUESTION:
Problem 68P
A 5.00-kg package slides 1.50 m down a long amp that is inclined at 24.0° below the horizontal. The coefficient of kinetic friction between the package and the ramp is μk = 0.310 Calculate (a) the work done on the package by friction; (b) the work done on the package by gravity; (c) the work done on the package by the normal force; (d) the total work done on the package. (e) If the package has a speed of 2.20 m/s at the top of the ramp, what is its speed after sliding 1.50 m down the ramp?
ANSWER:
Solution 68P
Mass of the package is 5 kg.
The length of the inclined plane is 1.5 meters.
The angle of inclination is .
Coefficient of kinetic friction is, .
a)
The frictional force is,
The direction of frictional force is antiparallel to the direction of displacement.
So, the work done by the frictional force is,
.
The minus sign indicates the work done is negative.
b)