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COLLEGE PHYSICS

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A 1100kg car starts from rest, accelerates for 5 seconds. The magnitude of acceleration is (a)= 4.6m/s2. find the average power generated by the net force that accelerates the vehicle? what do i do here

i know that F=ma= 1100x4.6=5060=F and
Wnet = 1/2mvf2-1/2mvi2 since it starts from rest Vi= 0
so 1/2mvf2 =(1/2)(1100)(4.6?)=11638 im a doing this right if not can someone tell me what to do?

  • COLLEGE PHYSICS -

    No.

    What is the final velocity?

    vf= at= 4.6*5 m/s
    What is the KE gained?
    1/2 m vf^2 (no initial KE)

    Work it took to provide this KE is equal to the KE.
    Power= work/time= KE/time

  • COLLEGE PHYSICS -

    VF=23m/s
    KE=290,950
    Power=58,190

    is this correct?
    thanx natali

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