1.

An elevator ascends with an upward acceleration of 0.2 m/s2. At the instanr its upward speed in 3 m/sec a loose bolt 5m high from the floor drops from the ceiling of the elevator. Find the tine maril the bolt strikes the floor and the displacement it has fallen

Answer»

Solution :Initial velocity of BOLT relative to the elevator =0 ACCELERATION of bolt relative
to the foor of the elevator =(9.8 +0.2) =10ms`""^2`
t=1 second. If s is the time of the displacement then
`s=-ut+1/2 GT^(2)""s=-3(1)+1/2 (9.8) (1)^(2)`
s=1.9m


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