JEE Main2004PhysicsWork, Power and EnergyActual
A body of mass m , accelerates uniformly from rest to v₁ in time t₁ . The instantaneous power delivered to the body as a function of time t is
Options
- Amv ₁ t t ₁
- Bmv ₁^2 t t ₁^2
- Cm v₁ t^2 t₁
- Dm v₁^2 t t₁
Correct answer
B. mv ₁^2 t t ₁^2
Step-by-step solution
Power P= F v = mav =m ( v₁ t₁ ) ( v₁ t₁ t )= m₁^2 t t₁^2