Thrust & Net Work

1. Mar 30, 2008

klopez

A plane is diving toward the ground and then climbs back upwards as shown below. A lift force acts perpendicular to the plane's displacement, s = 1.7 x 10$$^{3}$$ m, which should be taken to be the same for each case. The engines of the plane exert a thrust as shown which has the same magnitude during the dive and climb. The plane's weight is 5.9 x 10$$^{4}$$ N.

A) Is the total net work done by all the forces greater during the dive or the climb? Explain your answer.

B) Find the difference in the total net work done between the dive and the climb.

A picture of the situation is attached.

I am not sure how to start this problem. Should I break my force of gravity into components?

I have an exam tomorrow, so if this can be answered soon it would be greatly appreciated.

Thanks,

Kevin

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2. Mar 31, 2008

rock.freak667

I believe that you should break it into components, one should act in the opposite to the lift while the other acts opposite to the thrust