Grade 10Mechanics
By integrating along the arc, show that the work done by gravity in Sample Problem 11-5 is equal to – mgh.
By integrating along the arc, show that the work done by gravity in Sample Problem 11-5 is equal to – mgh.
1 Answer
Jitender Pal
The motion is along an arc of radius L, and the displacement ds is always along the arc. At an intermediate point in the motion, the string makes an angle ? with the vertical which is shown in the below figure.
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