Question

in which condition will acceleration due to gravity of parachute be zero?

Answer 1

Answer:

Weightlessness

Weightlessness occurs during free fall and at the null point. The space between any two heavenly bodies at which the resultant gravity is zero is said to be a null point. In a falling parachute, when a weight of the parachute becomes equal to the air resistance, its acceleration is zero.

Explanation:

(Acceleration never becomes zero as other posters have said).

So you want to know when a skydiver feels “zero-G”?

When jumping from an “aerostat” or vertically stationary object, you experience zero-G momentarily. This is true for helicopters, cliffs, towers, buildings, balloons, and stationary blimps.

But when you jump from an Aeroplane in motion…or a dirigible, you immediately have a retarding drag caused by its forward motion, so no zero-G feeling.