An airplane rolls down a runway with its engines at full throttle. The engines
generate a forward thrust of 30,000N. There is also a drag force of 10,000N due to air friction.
The total force on this airplane is
(A) 40,000N forward.
(B) 30,000N forward.
(C) 20,000N forward.
(D) 10,000N backward
(E) 10,000N upward
An airplane rolls down a runway with its engines at full throttle. The engines
generate a forward thrust of 30,000N. There is also a drag force of 10,000N due to air friction.
The total force on this airplane is
(A) 40,000N forward. --- No.
Thrust and drag components have opposite signs.
An airplane rolls down a runway with its engines at full throttle. The engines
generate a forward thrust of 30,000N. There is also a drag force of 10,000N due to air friction.
The total force on this airplane is
(B) 30,000N forward. --- No.
Add both force components.
An airplane rolls down a runway with its engines at full throttle. The engines
generate a forward thrust of 30,000N. There is also a drag force of 10,000N due to air friction.
The total force on this airplane is
(C) 20,000N forward. --- Yes.
30,000N - 10,000N.
An airplane rolls down a runway with its engines at full throttle. The engines
generate a forward thrust of 30,000N. There is also a drag force of 10,000N due to air friction.
The total force on this airplane is
(D) 10,000N backward --- No.
Add both force components.
An airplane rolls down a runway with its engines at full throttle. The engines
generate a forward thrust of 30,000N. There is also a drag force of 10,000N due to air friction.
The total force on this airplane is
(E) 10,000N upward --- No.
The airplane is rolling, so it is in vertical equilibrium.
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