Question

A lift is moving up with a constant velocity 5 cm. A bolt is detached from the lift then its initial
velocity is​

Answer 1

Answer:

5 wrt ground

0 wrt lift

If observer is in lift he will see bolt dropping from rest .

Explanation:

Moment of inertia .

Imagine

See like you are travelling in a bus and you jumps you come back almost where you jump . It is not that you stay in air and bus go ahead and you impact back of bus .

Answer 2

The initial velocity is -5 m/s.

Explanation:

Given The,

Velocity of lift = 5 cm

The initial velocity of freely falling bolt must be zero.

Here, The lift is going upwards.

Therefore, for initial velocity of bolt the velocity of lift must be considered.

We need to calculate the initial velocity

Using formula of relative velocity

$v_{bf}=v_{bolt}-v_{lift}$

Where, $v_{bf}$=velocity of bolt lift

Put the value into the formula

$v_{bf}=0-5$

$v_{bf}=-5\ m/s$

Hence, The initial velocity is -5 m/s.

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Topic : velocity

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