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

Author Question: A 2-kg ball is held 4 m above the ground. Relative to the ground its potential energy is A) 6 J. ... (Read 93 times)

skymedlock

  • Hero Member
  • *****
  • Posts: 561
on: Jul 29, 2018
A 2-kg ball is held 4 m above the ground. Relative to the ground its potential energy is
 
  A) 6 J.
  B) 8 J.
  C) 32 J.
  D) 80 J.
  E) more than 80 J.

Question 2

A clerk can lift cylindrical packages 1 meter vertically, or can roll them up a 2-meter-long ramp to the same elevation. With the ramp, the applied force required is about
 
  A) half as much.
  B) the same.
  C) twice as much.
  D) four times as much.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Jadwiga9

  • Sr. Member
  • ****
  • Posts: 316
Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: D

Answer to Question 2

Answer: A


skymedlock

  • Member
  • Posts: 561
Reply 2 on: Jul 29, 2018
:D TYSM

kjohnson

  • Member
  • Posts: 330
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

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?

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?

Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

Did you know?

Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

Relative permeability of an artificial phospholipid bilayer to a variety of solutes. Relative permeability of an artificial phospholipid bilayer to a variety of solutes.
Energy flow through an ecosystem. Energy flow through an ecosystem.
Sources of Energy in the United States Sources of Energy in the United States
Kinetic Energy Kinetic Energy
Resting Membrane Potential Resting Membrane Potential
Comparing uncontrolled and controlled energy release. Comparing uncontrolled and controlled energy release.
Video: Depolarization of the SA node, Action potentials of the myocardium & ANS effects

For a complete list of videos, visit our video library