AN ELEVATOR(ELE) IS GOING UP WITH 5 ACCELERATION. A BOY ON THE ELE SHOOTS A BALL VERTICALLY FROM 2m HEIGHT FROM THE FLOOR OF THE ELE.AT THIS TIME ELE IS GOING UP WITH 10m/S VELOCITY AND THE FLOOR OF ELE IS AT 50m FROM THE GROUND.THE INITIAL VELOCITY OF THE BALL IS 15M/S W.R.T ELE. g=10.1)TIME AT WHICH THE BALL STRIKES THE FLOOR OF ELE.ANS)2.13 SEC2)MAX HEIGHT REACHED FROM GROUND BY THE BALLANS)82.56 m3)DISPLACEMENT OF BALL W.R.T GROUNDDURING ITS FLIGHTANS)30.56 m4)MAX SEPERATION BETWEEN THE FLOOR OF ELE AND THE BALL DURING ITS FLIGHT.ANS)9.5 m
sam 94 , 13 Years ago
Grade 11