More Conservation of Energy Problems Video Lessons

Video Thumbnail

Example

Problem: Suppose a 1.6x105-kg airplane has engines that produce 125 MW of power.Part (a). How many seconds would it take the airplane to reach a speed of 265 m/s and an altitude of 13.5 km, if air resistance were negligible? Part (b). How much power did the plane use, in megawatts, if this process actually took 825 s? Part (c) Using the power consumption from papart (b), what would be the magnitude of the average force, in newtons, of the air resistance, if the airplane took 1050 s and traveled in a straight line at a constant acceleration to the specified altitude?

FREE Expert Solution

From the conservation of energy, the total mechanical energy is given by the sum of the kinetic energy and the potential energy:

Emech=12mv2+mgh

95% (478 ratings)
View Complete Written Solution
Problem Details

Suppose a 1.6x105-kg airplane has engines that produce 125 MW of power.

Part (a). How many seconds would it take the airplane to reach a speed of 265 m/s and an altitude of 13.5 km, if air resistance were negligible? 

Part (b). How much power did the plane use, in megawatts, if this process actually took 825 s? 

Part (c) Using the power consumption from papart (b), what would be the magnitude of the average force, in newtons, of the air resistance, if the airplane took 1050 s and traveled in a straight line at a constant acceleration to the specified altitude?

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the More Conservation of Energy Problems concept. You can view video lessons to learn More Conservation of Energy Problems. Or if you need more More Conservation of Energy Problems practice, you can also practice More Conservation of Energy Problems practice problems.