physics

posted by .

An aircraft has an initial mass of m0 and an initial acceleration of a0. After flying for 2 hours, the mass of the aircraft has decreased by 11%, due to the burning of the fuel. If the propulsive force provided by the engines is constant, what is the expression for the new acceleration, a2, at this time? You may assume that the aircraft is in level flight at all times and the air resistance is negligible.

Select one:
a. a2=0.89a0
b. a2=a0/0.89
c. a2=1.11a0
d. a2=1+0.11a0

  • physics -

    Using Newton's second law: F=ma
    and since F=constant,
    we have
    m0a0=m2a2
    Knowing that m2/m0=(1-0.11)=0.89
    you can solve for a2.

    Note: it does not seem realistic that an aircraft accelerates horizontally for two hours and continue accelerating!

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. science physics

    a small aircraft experiences s lift force equal to 3.8 times of its weight. a)draw a diagram to show the forces acting on the aircraft when it is flying in a horizontal circle with its wing banked at an angle to the horizontal b)determine …
  2. physics

    The aircraft has a take-off mass of 320 000 kg. Each of the 4 engines can produce a maximum force of 240 kN. calculate the maximum acceleration of the aircraft.
  3. physics

    The aircraft has a take-off mass of 320 000 kg. Each of the 4 engines can produce a maximum force of 240 kN. calculate the maximum acceleration of the aircraft. the answer is 3m/s^2 but i don't know how to get it.
  4. Math Calculus 2

    At a certain instant an aircraft flying due east at 240 miles per hour passes directly over a car traveling due southeast at 60 miles per hour on a straight, level road. If the aircraft is flying at an altitude of .5mile, how fast …
  5. machanics

    A space aircraft is launched straight up.The aircraft motor provides a constant acceleration for 10 seconds,then the motor stops.The aircraft's altitude 15 seconds after launch is 2 km.ignore air friction .what is the acceleration,maximum …
  6. physics

    A space aircraft is launched straight up. The aircraft motor provides a constant acceleration for 10seconds, then the motor stops. The aircraft's altitude 15seconds after launch is 2km. Ignore air friction. Determine (i) the acceleration, …
  7. math

    An aircraft is flying in a straight line away from a person standing on the ground. The initial angle of elevation changes from 70 degrees to 30 degrees in 1 minute. What is the cruising speed of the aircraft if its altitude is 10,000 …
  8. Physics

    The space shuttle, with an initial mass M = 2.41×106 kg, is launched from the surface of the earth with an initial net acceleration a = 26.1 m/s^2. The rate of fuel consumption is R = 6.90×103 kg/s. The shuttle reaches outer space …
  9. Physics

    A certain aircraft has a liftoff speed of 126 km/h. (a) What minimum constant acceleration does the aircraft require if it is to be airborne after a takeoff run of 244 m?
  10. Physics

    A jet aircraft rolls onto the end of a runway before accelerating down the runway for takeoff. At the point where the aircraft leaves the ground, it is traveling at 100 m/s. If the aircraft's initial speed when it rolled onto the runway …

More Similar Questions