MTEL Technology and Engineering

Correct Response: C. Vehicle design typically takes into account four forces. Drag is the force that slows the vehicle down. An example would be a parachute used to decrease speed at the end of a run. Lift (A) is the force that allows an airplane or a helicopter leave the ground. Lift is not desirable for land vehicles. Thrust (B) is the force that drives the vehicle forward. Finally, weight is the gravitational force (D) that pulls all vehicles downwards.