Coyote $($mc$=12\mathrm{.}0$kgmc$=12\mathrm{.}0$kg$)$ is about to try out his new rocket sled $($mr$=53\mathrm{.}5$kgmr$=53\mathrm{.}5$kg$),$ which can produce a thrust of $1850$N$1850$N$.$

Answer the three parts below, using three sig figs.

Part A $-$ What is the value of the normal force, FNFN$,$ exerted upwards by the road?

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FNFN $=$

nothing

NN

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Part B $-$ If the effective frictional coefficient between the rolling wheels and the road is $=5\mathrm{.}20102$$=5\mathrm{.}20102,$ what will be the value of the frictional force, ff$,$ once movement begins?

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ff $=$

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Part C $-$ What will be the value of the acceleration, aa$,$ while Coyote and the apparatus are in motion with the rocket firing?