Question

A stone is released from an elevator going up with acceleration $5m/s^2$ . The acceleration of the stone after the release is:

• A. $5m{s}^{-2}$
• B. $4.8m{s}^{-2}$ upward
• C. 4.8 down ward
• D. $9.8m{s}^{-2}$ down ward

Answer 1

Answer: (D)

$9.8m{s}^{-2}$ down ward

After stone is released from elevator only force acting on stone will be due to gravity. Therefore acceleration of stone will be equal to $g$ that is $9.8m/s^2$ downwards. Note that here acceleration is asked w.r.t to earth not w.r.t to elevator