Question

n object accelerates only if the forces acting on it, in one direction only, are greater than the forces pulling on it in the opposite direction. All of the following objects will accelerate except for one, which one will not accelerate?


An airplane in horizontal flight when the thrust of the engine is equal to the drag of the air.
a rocket fired straight up, when the engine thrust is equal to the air resistance.
a man in a parachute when the air resistance is less than his weight.
a gas balloon where the buoyant force is greater than the weight of the balloon and air resistance.

Answer 1

Check Please, I think its A or B...

Answer 2

@petiteme

Answer 3

?

Answer 4

@skullpatrol

Answer 5

b

Answer 6

Thanks.

Answer 7

ya