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

Author Question: The speed of a 4.0-kg object is given by v = (2t) m/s, where t is in s. At what rate is the ... (Read 98 times)

jace

  • Hero Member
  • *****
  • Posts: 541
on: Jul 28, 2018
The speed of a 4.0-kg object is given by v = (2t) m/s, where t is in s. At what rate is the resultant force on this object doing work at t = 1 s?
 a. 48 W
  b. 40 W
  c. 32 W
  d. 56 W
  e. 16 W

Question 2

A 2.0-kg block slides down a plane (inclined at 40 with the horizontal) at a constant speed of 5.0 m/s. At what rate is the gravitational force on the block doing work?
 a. +98 W
  b. +63 W
  c. zero
  d. +75 W
  e. -75 W


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

manuelcastillo

  • Sr. Member
  • ****
  • Posts: 304
Reply #1 on: Jul 28, 2018
Answer to Question 1

E

Answer to Question 2

B


jace

  • Member
  • Posts: 541
Reply 2 on: Jul 28, 2018
Gracias!

rachel

  • Member
  • Posts: 323
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Glaucoma is a leading cause of blindness. As of yet, there is no cure. Everyone is at risk, and there may be no warning signs. It is six to eight times more common in African Americans than in whites. The best and most effective way to detect glaucoma is to receive a dilated eye examination.

Did you know?

Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

Did you know?

Over time, chronic hepatitis B virus and hepatitis C virus infections can progress to advanced liver disease, liver failure, and hepatocellular carcinoma. Unlike other forms, more than 80% of hepatitis C infections become chronic and lead to liver disease. When combined with hepatitis B, hepatitis C now accounts for 75% percent of all cases of liver disease around the world. Liver failure caused by hepatitis C is now leading cause of liver transplants in the United States.

Did you know?

Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.

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.

Increasing access to care for teen mothers is important because they have a higher rate of pregnancy ... Increasing access to care for teen mothers is important because they have a higher rate of pregnancy ...
Find the speed after 40.0 min if the initial speed is 3250 rev/min Find the speed after 40.0 min if the initial speed is 3250 rev/min
Population growth rate % Population growth rate %
The rate of global emissions is rising rapidly, especially in India and China The rate of global emissions is rising rapidly, especially in India and China
If a graph has the following x-intercepts, which value of x is the instantaneous rate of change ... If a graph has the following x-intercepts, which value of x is the instantaneous rate of change ...
A pool player is attempting a fancy shot. He hits the cue ball giving it a speed of 5.57 m/s ... A pool player is attempting a fancy shot. He hits the cue ball giving it a speed of 5.57 m/s ...
Video: DNA Sequences - Dideoxy Sequencing

For a complete list of videos, visit our video library