Questions
A particle is subjected to a force which varies with displacement as shown in figure. The total work done is
a
20J
b
30J
c
40J
d
50J
detailed solution
Correct option is C
Work done=Area of F-S graphWork done=Area of first triangle+Area of rectangle+Area of second triangleW=12×base×height+length×breadth+12×base×heightW=12×4×5+4×5+12×(12-8)×5W=10+20+10W=40JTalk to our academic expert!
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The force required to stretch a spring varies with the distance as shown in the figure. If the experiment is performed with the above spring of half length, the line OA will
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