oliviapug9662 oliviapug9662
  • 03-07-2019
  • Physics
contestada

What is the minimum work needed to push a 925-kg car 207 m up along a 14.5° incline? Ignore friction.

Respuesta :

JemdetNasr JemdetNasr
  • 06-07-2019

Answer:

4.7 x 10⁵ J

Explanation:

m = mass of the car = 925 kg

d = distance traveled parallel to incline = 207 m

θ = angle of the slope = 14.5 deg

Force applied to move the car up is given as

F = mg Sinθ                                               eq-1

minimum work needed is given as

W = F d

using eq-1

W =  mgd Sinθ

inserting the values

W = (925)(9.8)(207) Sin14.5

W = 4.7 x 10⁵ J

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