« previous next »

Author Question: Calculate the minimum average power output necessary for a person to run up a 12.0 m long hillside, ... (Read 88 times)

luminitza

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

  • Sr. Member
  • ****
  • Posts: 318
Reply #1 on: Jul 29, 2018
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
« previous next »
 

Did you know?

It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.

Did you know?

As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.

Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Did you know?

Over time, chronic hepatitis B virus and hepatitis C virus infections can progress to advanced liver disease, liver failure, and hepatocellular carcinoma. Unlike other forms, more than 80% of hepatitis C infections become chronic and lead to liver disease. When combined with hepatitis B, hepatitis C now accounts for 75% percent of all cases of liver disease around the world. Liver failure caused by hepatitis C is now leading cause of liver transplants in the United States.

Did you know?

The human body produces and destroys 15 million blood cells every second.

When the United States gets stuck over a controversial issue—usually something a divided Congress ca When the United States gets stuck over a controversial issue—usually something a divided Congress ca
Long-range forecasts Long-range forecasts
How to calculate compound interest (Part 1) How to calculate compound interest (Part 1)
Long-wave energy flux is emitted from Earth Long-wave energy flux is emitted from Earth
A pipe that is 0.46 m long and open at both ends vibrates in the second overtone with a ... A pipe that is 0.46 m long and open at both ends vibrates in the second overtone with a ...
A reciprocal translocation involving the long arms of chromosomes A reciprocal translocation involving the long arms of chromosomes
Video: Cellular Respiration & Glucose Mobilization (Glucose transport & Phosphorylation of Glucose)

For a complete list of videos, visit our video library