AP EAMCET201726 Apr 2017Morning ShiftPhysicsWork, Power and EnergyActual
A girl of mass 50 ~kg swinging on a cradle. If she moves with a velocity of 2 ~ms ⁻¹ upwards in a direction making an angle 60^ with the vertical, then the power generated is ( g =9.8 ~ms ⁻² )
Options
- A245 ~W
- B490 2 ~W
- C490 3 ~W
- D980 ~W
Correct answer
C. 490 3 ~W
Step-by-step solution
aligned & P= F V =m g v 150^ & =50 9.8 2 150^ =-490 3 w & P=490 3 watt aligned