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

Author Question: A physics professor pushes against a stationary wall, working up a sweat. Is he doing any actual ... (Read 43 times)

asmith134

  • Hero Member
  • *****
  • Posts: 576
on: Jul 29, 2018
A physics professor pushes against a stationary wall, working up a sweat. Is he doing any actual physical work on the wall?
 
  A) No--it's a law of nature that physics profs never do any actual work.
  B) No, because the force by his hands against the wall is balanced by the force by the wall pushing back.
  C) Yes, because he is exerting a force against the wall during a period of time.
  D) No, because the wall is not moving.
  E) Yes, because his arm muscles are moving other muscles through a distance.

Question 2

A projectile is fired from ground level with a speed of 150 m/s at an angle 30 above the horizontal on an airless planet where g = 10.0 m/s2. What is the horizontal component of its velocity after 4.0 s?
 
  A) 38 m/s B) 75 m/s C) 150 m/s D) 130 m/s E) 35 m/s
Physics ¦ Walker ¦ 5th Edition
Buy Test-Bank


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

nickk12214

  • Sr. Member
  • ****
  • Posts: 332
Reply #1 on: Jul 29, 2018
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
Answer Preview
Only 25% of students answer this correctly


asmith134

  • Member
  • Posts: 576
Reply 2 on: Jul 29, 2018
Wow, this really help

Animal_Goddess

  • Member
  • Posts: 339
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.

Did you know?

Your chance of developing a kidney stone is 1 in 10. In recent years, approximately 3.7 million people in the United States were diagnosed with a kidney disease.

Did you know?

Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.

Did you know?

Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.

Did you know?

According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.

A hypothetical model of the process of cell-wall expansion. A hypothetical model of the process of cell-wall expansion.
Angioplasty. One form is called balloon angioplasty, shown here. A balloon catheter is threaded into Angioplasty. One form is called balloon angioplasty, shown here. A balloon catheter is threaded into
Anni Albers, Wall hanging. Anni Albers, Wall hanging.
The Eye and the Eye Wall—a Closer Look The Eye and the Eye Wall—a Closer Look
Impulse in physics Impulse in physics
Physics Physics
Video: Chromosome structural organization/ Mechanisms for chromosome movement Animation

For a complete list of videos, visit our video library