Question

which scenario describes an object experiencing zero net force? (1 point) a balloon floating upward at a constant velocity. a plane landing on a runway. a car driving around a circular race track. a rock falling off a cliff.

Explanation:

Zero net force means no acceleration (Newton's first law). Constant velocity implies zero acceleration. A balloon with constant upward velocity has balanced forces (buoyancy = gravity + drag). Landing planes decelerate, cars on circular tracks accelerate (centripetal), and falling rocks accelerate due to gravity.

Answer:

A. A balloon floating upward at a constant velocity.