Question

a jet engine develops a forward force on the aircraft of 200000N.Calculate the power of engine if the air craft is flying at 720 km/h​

Answer 1

Given:

A jet engine develops a forward force on the aircraft of 200000N.

To find:

The power of engine if the air craft is flying at 720 km/h.

Calculation:

First , we need to convert the unit of Velocity from km/hr to m/s:

720 km/hr = 720 × (5/18) = 200 m/s

Now , power developed can be represented as the product of velocity and force of the object;

$\sf{ \therefore \: power = force \times velocity}$

$\sf{ = > \: power = 200000 \times 200}$

$\sf{ = > \: power = (2 \times {10}^{5} )\times (2 \times {10}^{2} )}$

$\sf{ = > \: power =4 \times {10}^{7} \: watt}$

So, final answer is:

Power developed is 4 × 10⁷ watt.

Other facts to know:

• Power is a scalar quantity.

• It represents the instantaneous rate of work done by a force.

• Power = dW/dt.

HOPE IT HELPS.