Question

Please solve the 60th question

Answer 1

Answer:

heya....

your answer is..

Explanation:

s=3t^3+7t^2+14t+8m.

put Time value.

s=3(1)^3+7(1)^2+14(1)+8m

s=3+7+14+8m

s=24+8m

a=21+8

a=32m/s^2.

option D is the right answer..

hope it's helps...

Answer 2

Answer:

THIS IS HOW YOU SOLVE IT

Explanation:

S=3t^3+7t^2+14t+8

Now it is displacement to find acceleration we have to to differentiate it twice that is d2s/dt^2 so by differentiating one time we get velocity

v=9t^2+14t+14

Now by again differentiating we get acceleration

d2s/dt^2=accleration=18t+14

Now time is t=1 sec

put time in above equation we get

acceleration=18(1)+14=32m/s^2

THEREFORE OPTION (D)