What Is the Acceleration of a Towed Glider?

[Mitchtwitchita]

Homework Statement

An airplane of mass 1.2 x 10^4 kg tows a glider of mass 0.6 x 10^4 kg. The airplane propellers provide a net forward thrust of 3.6 x 10^4. What is the gliders acceleration.

Homework Equations

F(net) = ma

The Attempt at a Solution

After drawing FBD's,

F(net) = ma
F = (m1 + m2)a
a = F/(m1 + m2)
= (3.6 x 10^4 N)/(1.2 x 10^4 kg + 0.6 x 10^4 kg)
=2 m/s^2

This seems way too easy, can anybody please help me?

 

[Mattowander]

Looks right to me

 

[Mitchtwitchita]

Wow, that was easy! Thanks Mattowander.