I need help with this please It is stated that a turbofan en

It is stated that a turbofan engine produces 15,000 pounds of thrust to propel an aircraft forward. Is \"pound\" mentioned here Ibm or lbf? Explain.

Solution

Thrust is the \"force\" generated by engine to move the aircraft through the air. Thus, \"pound\" here refers to the unit of force which is \"lbf\".