AP EAMCET202017 Sep 2020Evening ShiftPhysicsWork, Power and EnergyActual
(A ) force ( F =(5 i +4 j ) N ) acts on a body and produces a displacement (s=(6 i -5 j +3 k ) m ). The work done by the force is
Options
- A(10 ~J )
- B(20 ~J )
- C(30 ~J )
- D(40 ~J )
Correct answer
A. (10 ~J )
Step-by-step solution
Force applied on the body, ( aligned F & =(5 i +4 j ) N Displacement, s & =(6 i -5 j +3 k ) m Work done, W & = F s =(5 i +4 j ) (6 i -5 j +3 k ) & =30-20+0=10 ~J aligned )