To maintain a rotor at a uniform angular speed of 100 rad s-1, an engine needs to transmit torque of 100 N m. The power of the engine is

Question

To maintain a rotor at a uniform angular speed of 100 rad s-1, an engine needs to transmit torque of 100 N m. The power of the engine is (A) 10 kW (B) 100 kW (C) 10 MW (D) 100 MW

Tardigrade Admin · Accepted Answer

Here, ω = 100 rad s-1, τ = 100 N m As P = τω ∴ P= (100 N m) (100 rad s-1) = 10 ×103 W = 10 kW

Q. To maintain a rotor at a uniform angular speed of $100 r a d s^{- 1}$ , an engine needs to transmit torque of $100 N m$ . The power of the engine is

$10 kW$

$100 kW$

$10 M W$

$100 M W$

Here, $ω = 100 r a d s^{- 1}, τ = 100 N m$
As $P = τ ω$
$∴ P = (100 N m) (100 r a d s^{- 1})$
$= 10 \times 1 0^{3} W = 10 kW$

Q. To maintain a rotor at a uniform angular speed of 100rads−1, an engine needs to transmit torque of 100Nm. The power of the engine is

10kW

100kW

10MW

100MW