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

Author Question: Two blocks are released from the top of a building. One falls straight down while the other slides ... (Read 304 times)

Awilson837

  • Hero Member
  • *****
  • Posts: 509
on: Jul 28, 2018
Two blocks are released from the top of a building. One falls straight down while the other slides down a smooth ramp. If all friction is ignored, which one is moving faster when it reaches the bottom?
 a. The block that went straight down.
  b. The block that went down the ramp.
  c. They both will have the same speed. d. Insufficient information to work the problem.

Question 2

A heat engine exhausts 4000 J of heat while performing 2000 J of useful work. What is the efficiency of the engine?
 a. 15
  c. 40
  b. 33
  d. 60


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

heyhey123

  • Sr. Member
  • ****
  • Posts: 353
Reply #1 on: Jul 28, 2018
Answer to Question 1

C

Answer to Question 2

B


Awilson837

  • Member
  • Posts: 509
Reply 2 on: Jul 28, 2018
Wow, this really help

dyrone

  • Member
  • Posts: 322
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

Did you know?

When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

Did you know?

The average person is easily confused by the terms pharmaceutics and pharmacology, thinking they are one and the same. Whereas pharmaceutics is the science of preparing and dispensing drugs (otherwise known as the science of pharmacy), pharmacology is the study of medications.

Did you know?

The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.

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.

Building competency Building competency
Building competency in safety Building competency in safety
Teresa Hubbard and Alexander Birchler, Detached Building. Teresa Hubbard and Alexander Birchler, Detached Building.
Preparing Slides Preparing Slides
Keep the spine straight while sitting down. Keep the spine straight while sitting down.
Two stubby screwdrivers used to access screws that have limited space above. A straight blade is on ... Two stubby screwdrivers used to access screws that have limited space above. A straight blade is on ...
Video: Muscle cell structures - actin, myosin and titin filaments

For a complete list of videos, visit our video library