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A mechanic pushes a 2.0 103 kg car from rest to a speed of v, doing 5350 J of work in the process. During this time, the car moves 29.0 m. Neglecting friction between car and road, find each of the following.
(a) the speed v
(b) the horizontal force exerted on the car

  • phys -

    for a) w= 1/2 (m)(v^2) so just plug in the work that is given and the mass, and solve for v.

    for b) w=fd so f=w/d so plug in work and distance, convert as needed, and you're set. Hope I helped, even though I answered your question almost 3 years late!

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