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# The x and y coordinates of the particle at any time are x=5t−2t2 and y=10t respectively, where x and y are in meters and t in seconds. The acceleration of the particle at t=2 s is:05 m/s2−4 m/s2−8 m/s2

A
5 m/s2
B
4 m/s2
C
0
D
8 m/s2
Solution
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#### x=5t−2t2y=10tdxdt=5−4tax=d2xdt2=−4ay=d2ydt2=0a=ax+ay=−4+0a=−4 ms2

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