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Question

A car is moving on a straight road. The velocity of the car varies with time as shown in the figure. Initially (at t=0), the car was at x=0, where, x is the position of the car at any time ‘t’.

The maximum displacement from the starting position will be

A
200 m
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B
250 m
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C
160 m
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D
165 m
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Solution

The correct option is A 200 m
Positive increase in area of vt curve shows positive increase in displacement. So displacement is increasing till t=50 s
Max displacement = positive vt area.
Max displacement =1/2×4×10+10×4+12×10×(4+8)+1/2×20×8
=20+40+60+80
=200 m

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