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Author Question: A 2.0-kg object is moving without friction along the x-axis. The potential energy curve as a ... (Read 64 times)

D2AR0N

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  • 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

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Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: B

Answer to Question 2

Answer: A


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