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Starting at rest , a 10kg object is acte...

Starting at rest , `a 10kg` object is acted upon by only one force as indicated in figure. Then the total work done by the force is `:`

A

90 J

B

125 J

C

245 J

D

490 J

Text Solution

Verified by Experts

The correct Answer is:
B
Change in Velocity=`("area under F-T graph")/("mass")`
=`(60+(-10))/(10)=5" "m/s`
`W_F=DeltaK.E.=1/2(10)` `5^2=125` J
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