Question

) X=6+5t+9t3. Calculate velocity at t=2sec​

Answer 1

Answer:

x=5t2+18t(1)v=dtdx=10t+18

att=2s,v=10×2+18=38m/s

(2)Average,velocity=timedisplacementatt=2,x=5(2)2+18×2=56mt=3,x=5(3)2+18×3=99mAveragevelocity=3−299−56=43 m/s

Answer 2

Answer:

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5b and all the best to you are the the 8x 467