« previous next »

Author Question: A 55-kg box rests on a horizontal surface. The coefficient of static friction between the box and ... (Read 87 times)

sarasara

  • Hero Member
  • *****
  • Posts: 521
on: Jul 29, 2018
A 55-kg box rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.30. A horizontal 140-N force is exerted on the box. What is the friction force exerted by the surface on the box?
 
  A) 140 N
  B) 160 N
  C) 16.5 N
  D) 0.00 N
  E) 42 N

Question 2

The energy transformation that occurs during downhill skiing is
 
  A) kin E  grav E.
  B) chem E  kin E + therm E.
  C) kin E  grav E + therm E.
  D) grav E  chem E.
  E) grav E  kin E + therm E.


mk6555

  • Sr. Member
  • ****
  • Posts: 310
Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

E


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

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?

Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.

Did you know?

The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

Did you know?

The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.

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.

Migration of Surface Cyclones Relative to Rossby Waves Migration of Surface Cyclones Relative to Rossby Waves
Circular friction around the ankle with the fingertips. Applying pressure with the fingertips, move ... Circular friction around the ankle with the fingertips. Applying pressure with the fingertips, move ...
Apply circular friction to the left side of the neck along cervical muscles with the fingertips of ... Apply circular friction to the left side of the neck along cervical muscles with the fingertips of ...
Apply circular friction with both hands to mobilize the scalp. Apply circular friction with both hands to mobilize the scalp.
Surface impoundments Surface impoundments
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: Audiology

For a complete list of videos, visit our video library