A particle of mass `1 kg` is moving X-axis. Its velocity is `6 m//s` at `x = 0`. Acceleration-displacement curve and potential energy-dispalcement curve of the particle are shown : .A. the work done by all the forces is `704 J`B. the work done by external forces is `350 J`C. the work done by external forces is `384 J`D. the work done by conservation forces is `300 J`.

A particle of mass `1 kg` is moving X-axis. Its velocity is `6 m//s` a

1.	A particle of mass `1 kg` is moving X-axis. Its velocity is `6 m//s` at `x = 0`. Acceleration-displacement curve and potential energy-dispalcement curve of the particle are shown : .A. the work done by all the forces is `704 J`B. the work done by external forces is `350 J`C. the work done by external forces is `384 J`D. the work done by conservation forces is `300 J`.
Answer» Correct Answer - A::C Area of `(a-t)` curve `= 32 ms^(-1) = V_(f) - V_(i)` `V_(f)=32 +V_(i)=32+6 = 38 ms^(-1)` work done by all forces `= Delta KE` =`(1)/(2)m(V_(f)^(2)-V_(i)^(2))=(1)/(2)(38^(2) -6^(2))=704 J` work done by external forces `= 704 -320 = 384 J`.

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