21. A particle moves along the X-axis from x =
0 to x = 5 m under the influence of a force
given by F = 10 - 2x + 3x'. Work done in
the process is
(a) 70 units
(b) 270 units
(c) 35 units
(d) 150 unit
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1
Answer:
f=10-2*5+3*5=8-10+15=70
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