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 84 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?

The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.

Did you know?

In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

Did you know?

Warfarin was developed as a consequence of the study of a strange bleeding disorder that suddenly occurred in cattle on the northern prairies of the United States in the early 1900s.

Did you know?

Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.

Did you know?

Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

The Z scheme, which depicts the energy of an electron as it moves from photosystem II to NADP+ The Z scheme, which depicts the energy of an electron as it moves from photosystem II to NADP+
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
The New Solar Power Station Near Seville, Spain The New Solar Power Station Near Seville, Spain
Flynn Effect IQ scores have risen across developed countries in recent decades. Source: Flynn (199 Flynn Effect IQ scores have risen across developed countries in recent decades. Source: Flynn (199
Blocked at every turn by congressional Republicans who hated him, President Obama turned to techniqu Blocked at every turn by congressional Republicans who hated him, President Obama turned to techniqu
Finding the derivative using the power rule - Solutions Finding the derivative using the power rule - Solutions
Video: Introduction to Genetics

For a complete list of videos, visit our video library