2 Answers

AKASH GOYAL AskiitiansExpert-IITD
420 Points
12 years ago

Dear Nikhil

For sign of u see the slope (dx/dt) is positive or negative

at t1 slope is +ve u will be +ve

at t2 slope is zero , u will be zero

at t3 slope is -ve, u will be negative

For sign of ax (d2x/dt2) see whether curve is concave upwards or downwards

at t1 and t3 it is concave upwards hence ax is +ve

at t2 it is concave downwards hence ax is -ve

All the best.




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Rahul Kumar
131 Points
11 years ago

Hi Shashank,

Please complete you question what exactally you want to know.

Think You Can Provide A Better Answer ?