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Author Question: Calculate the minimum average power output necessary for a person to run up a 12.0 m long hillside, ... (Read 72 times)

luminitza

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on: Jul 29, 2018
Calculate the minimum average power output necessary for a person to run up a 12.0 m long hillside, which is inclined at 25.0 above the horizontal, in 3.00 s. You can neglect the person's kinetic energy.
 
  Express your answer in horsepower. (1 hp = 746 W)
  A) 1.24 hp
  B) 2.93 hp
  C) 1.86 hp
  D) 0.740 hp

Question 2

A 7.0-kg rock is subject to a variable force given by the equation F(x) = 6.0 N - (2.0 N/m)x + (6.0 N/m2)x2 If the rock initially is at rest at the origin, find its speed when it has moved 9.0 m.
 
  What will be an ideal response?


djofnc

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Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: A

Answer to Question 2

Answer: 20 m/s


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