Author Question: Calculate the minimum average power output necessary for a person to run up a 12.0 m long hillside, ... (Read 48 times)

luminitza

  • Hero Member
  • *****
  • Posts: 555
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

  • Sr. Member
  • ****
  • Posts: 318
Answer to Question 1

Answer: A

Answer to Question 2

Answer: 20 m/s



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).

Did you know?

Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

Did you know?

Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

Did you know?

Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.

For a complete list of videos, visit our video library