This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: When an automobile moves with constant velocity the power developed is used to overcome the ... (Read 100 times)

cookcarl

  • Hero Member
  • *****
  • Posts: 539
on: Jul 28, 2018
When an automobile moves with constant velocity the power developed is used to overcome the frictional forces exerted by the air and the road. If the power developed in an engine is 50.0 hp, what total frictional force acts on the car at 55 mph (24.6 m/s)? One horsepower equals 746 W.

Question 2

While running, a person dissipates about 0.6 J of mechanical energy per step per kilogram of body mass. If a 60-kg person runs with a power of 70 Watts during a race, how fast is the person running? Assume a running step is 1.5 m long.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

epscape

  • Sr. Member
  • ****
  • Posts: 335
Reply #1 on: Jul 28, 2018
Answer to Question 1

1 520 N

Answer to Question 2

2.92 m/s


cookcarl

  • Hero Member
  • *****
  • Posts: 539
Reply #2 on: Jul 28, 2018
Thank you!


epscape

  • Sr. Member
  • ****
  • Posts: 335
Reply #3 on: Jul 28, 2018
Always glad to help...


« previous next »
 

Did you know?

Everyone has one nostril that is larger than the other.

Did you know?

Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

Did you know?

A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

Did you know?

Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.

Did you know?

Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

Cryptorchidism. (a) In complete cryptorchidism, the testes of a newborn have failed to descend into Cryptorchidism. (a) In complete cryptorchidism, the testes of a newborn have failed to descend into
Power in the United States: The Model Proposed by C. Wright Mills Power in the United States: The Model Proposed by C. Wright Mills
The side injector combines with the shape of the piston to create a swirl as the piston moves up ... The side injector combines with the shape of the piston to create a swirl as the piston moves up ...
Cylinder Power Balance Test Cylinder Power Balance Test
Life Expectancy in Developed Countries Life Expectancy in Developed Countries
A ship is being pulled through a harbor at constant velocity by two tugboats as shown in the ... A ship is being pulled through a harbor at constant velocity by two tugboats as shown in the ...
Video: Tuberculosis Testing

For a complete list of videos, visit our video library