Question

what control(s) in a car change only the speed of a car? (check all that apply)
gas pedal
brake pedal
steering wheel
air conditioner
none of the above

Explanation:

• Gas pedal: Pressing the gas pedal increases the car's speed by supplying more fuel to the engine, affecting only speed (assuming no gear changes or other factors, and focusing on the primary effect of changing speed).
• Brake pedal: Pressing the brake pedal applies friction to slow down the car, changing only the speed (not the direction, unlike the steering wheel).
• Steering wheel: The steering wheel changes the direction of the car, not the speed.
• Air conditioner: The air conditioner is for climate control and has no effect on the car's speed.

Answer:

A. Gas pedal, B. Brake pedal