Question

An object of mass 2 kg falls with an acceleration of 9.8 m/s2 towards the ground. With what acceleration will an object of mass 4 kg fall?

Answer 1

The 4kg object will also fall with an acceleration of 9.8m/s2 because mass has no effect over acceleration.

The reason why a stone falls faster than a feather is due to air resistance.

However, if dropped in vacuum, they will hit the ground together. You can see such videos on YouTube.

Answer 2

9.8 m/s²

The acceleration received by the mass of 2 kg is acceleration due to gravity.

The acceleration gained by an object owing to gravitational force is known as acceleration due to gravity. The SI unit for it is m/s². It is a vector quantity since it has both magnitude and direction. The acceleration owing to gravity is denoted by the letter g. G has a standard value of 9.8 m/s² on the earth's surface at sea level.

Hence, the object of 4 kg mass also falls with an acceleration of 9.8 m/s².