A lift is going up. total mass of lift and passenger is 1500, kg . variation in speed of lift is as

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2.Motion in Straight Line

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A lift is going up. The total mass of the lift and the passenger is $1500\, kg$. The variation in the speed of the lift is as given in the graph. the height to which the lift takes the passenger is ............ $m$

A

$3.6$

B

$8$

C

$1.8$

D

$36$

Solution

(d)Distance travelled by the lift $ = $ Area under velocity time graph

$ = \left( {\frac{1}{2} \times 2 \times 3.6} \right) + \left( {8 \times 3.6} \right) + \left( {\frac{1}{2} \times 2 \times 3.6} \right)$= $36m$

Standard 11

Physics

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