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Author Question: Two blocks are at rest on a horizontal frictionless surface with a compressed spring between them. ... (Read 144 times)

eruditmonkey@yahoo.com

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  • Posts: 546
on: Jul 28, 2018
Two blocks are at rest on a horizontal frictionless surface with a compressed spring between them. The 15.0-kg block accelerates when the string holding the system in compression is cut and the 30.0-kg box accelerates in the opposite direction. What is the magnitude of the force from the expanding spring on the 30.0-kg box when the 15.0-kg box is undergoing an acceleration of 5.00 m/s2?
 a. 37.5 N
  b. 150 N
  c. 225 N
  d. 75.0 N
  e. 0 N

Question 2

A 16.0-kg mass and a 2.25-kg mass are connected by a light string over a massless, frictionless pulley. If g = 9.8 m/s2, what is the acceleration of the system when released?
 a. 13.0 m/s2
  b. 7.38 m/s2
  c. 179 m/s2
  d. 9.80 m/s2
  e. 1.86 m/s2


livaneabi

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Reply #1 on: Jul 28, 2018
Answer to Question 1

d

Answer to Question 2

b


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