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 105 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 first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.

Did you know?

Addicts to opiates often avoid treatment because they are afraid of withdrawal. Though unpleasant, with proper management, withdrawal is rarely fatal and passes relatively quickly.

Did you know?

Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.

Did you know?

Thyroid conditions may make getting pregnant impossible.

Did you know?

Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.

Diagram of a typical fossil-fueled power plant Diagram of a typical fossil-fueled power plant
Teenage Pregnancy Rates in Developed Countries Teenage Pregnancy Rates in Developed Countries
The power and control wheel illustrates the strategies that one partner may use to intimidate, ... The power and control wheel illustrates the strategies that one partner may use to intimidate, ...
Reaction at constant-pressure Reaction at constant-pressure
Your nose runs like a leaky faucet and turns beet red from constant wiping Your nose runs like a leaky faucet and turns beet red from constant wiping
What is the maximum velocity (in km/s) of a photoelectron emitted from a surface whose work ... What is the maximum velocity (in km/s) of a photoelectron emitted from a surface whose work ...
Video: Hormonal feedback loop components & Glucagon (glycogenolysis and gluconeogenesis)

For a complete list of videos, visit our video library