« previous next »

Author Question: A 2.0-kg object is moving without friction along the x-axis. The potential energy curve as a ... (Read 62 times)

D2AR0N

  • Hero Member
  • *****
  • Posts: 561
on: Jul 29, 2018
A 2.0-kg object is moving without friction along the x-axis. The potential energy curve as a function of position is shown in the figure, and the system is conservative.
 
  If the speed of the object at the origin is 4.0 m/s, what will be its speed at 7.0 m along the +x-axis?
 
  A) 4.0 m/s
  B) 4.2 m/s
  C) 4.4 m/s
  D) 4.6 m/s
  E) 9.8 m/s

Question 2

A car on a roller coaster starts at zero speed at an elevation above the ground of 26 m. It coasts down a slope, and then climbs a hill. The top of the hill is at an elevation of 16 m. What is the speed of the car at the top of the hill?
 
  Neglect any frictional effects.
  A) 14 m/s
  B) 18 m/s
  C) 10 m/s
  D) 9.0 m/s
  E) 6.0 m/s


braelync

  • Sr. Member
  • ****
  • Posts: 350
Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: B

Answer to Question 2

Answer: A


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

Did you know?

A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

Did you know?

Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.

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.

Did you know?

Common abbreviations that cause medication errors include U (unit), mg (milligram), QD (every day), SC (subcutaneous), TIW (three times per week), D/C (discharge or discontinue), HS (at bedtime or "hours of sleep"), cc (cubic centimeters), and AU (each ear).

Time course and phases of a nerve cell going from resting potential to action potential Time course and phases of a nerve cell going from resting potential to action potential
How to find the equation of a cosine curve How to find the equation of a cosine curve
Rich Energy Deposits Rich Energy Deposits
Apply circular friction with both hands to mobilize the scalp. Apply circular friction with both hands to mobilize the scalp.
The flow of energy and the cycling of materials maintain nature’s organization The flow of energy and the cycling of materials maintain nature’s organization
Predicted polypeptide sequences translated from potential ORFs in the human TUBA3C gene Predicted polypeptide sequences translated from potential ORFs in the human TUBA3C gene
Video: The pH scale - Strong acids and Weak acids

For a complete list of videos, visit our video library