Question

two objects of mass M1 and M2 are dropped in vacuum from a height above the surface of earth M1>M2. Will there be any difference in the time in which the two respectively q reach the ground? give reasons for your answer

Answer 1

Answer:

it reach the ground at the same time

Explanation:

because ther is no air friction

Answer 2

No, there will not be any difference in the time in which the two objects respectively reach the ground.

• When an object is released from a height h, it is pulled downwards by the gravitational force due to the Earth.

• The acceleration due to gravity g is constant and is the same for all the objects irrespective of their masses. It is approximately equal to 9.8 m/s².
• Thus, when an object falls from a height, it moves under constant acceleration. Due to this, the equations of motion can be applied to the object.
• Using the 2nd equation of motion, h = ut + 0.5gt². Since u = 0 m/s

      ⇒ h = 0.5 gt²

      or t = $\sqrt{\frac{2h}{g} }$

• Hence proved that the time required by an object to reach the ground is independent of the object's mass and depends only on the distance through which it is falling.