An airplane with mass 200,000 kg is traveling with a speed of
268 m/s the kinetic energy of the plane speed is 7.18 x 10'J.
A wind picks up, which causes the plane to lose 1.20 x 10 J per
second. How fast is the plane going after 25.0 seconds?
a
250.207 m/s
b 204.509 m/s
c
190.423 m/s
d
144.527 m/s

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.

Aplane flying horizontally at an altitude of 1 mile and a speed of of 500mih passes directly over a radar station. find the rate at which the distance from the plane to the station is increasing when it is 2mi away from the station.