A bolt detaches from the ceiling of a lift of height h while the lift has upward acceleration a. Immediately before detachment the bolt is at rest relative to the lift. Neglect air resistance. Which statements are correct?
Select all that apply

Question

A bolt detaches from the ceiling of a lift of height h while the lift has upward acceleration a. Immediately before detachment the bolt is at rest relative to the lift. Neglect air resistance. Which statements are correct?

Select all that apply

G1 Physics · Accepted Answer

The common instantaneous velocity cancels in relative motion. Bolt acceleration is −g and lift acceleration is +a, so relative acceleration is −(g+a). Starting with zero relative speed across separation h gives t=√[2h/(g+a)].