An airport has runways only 145 m long. A small plane must reach a ground speed of 44 m/s before it can become airborne. What average acceleration must the plane’s engines provide if it is to take off safely from its airport?

The value  is    

Explanation:

From the question we are told that  

  The length of the runways is  

  The required ground of a small plane is  

Generally from kinematics equation

Here u  is the initial speed of the plane which is 0 m/s

so

=>    

like poles repel so keep pushing north to north and repels funny to see this

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )