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Author Question: A 2.0-kg block situated on a frictionless incline is connected to a light spring (k = 100 N/m), as ... (Read 280 times)

Wadzanai

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on: Jul 28, 2018

A 2.0-kg block situated on a frictionless incline is connected to a light spring (k = 100 N/m), as shown. The block is released from rest when the spring is unstretched. The pulley is frictionless and has negligible mass. What is the speed of the block when it has moved 0.20 m down the plane?
 
   


   
  a.
  76 cm/s
   
  b.
  68 cm/s
   
  c.
  60 cm/s
   
  d.
  82 cm/s
   
  e.
  57 cm/s

Question 2

The horizontal surface on which the block slides is frictionless. The speed of the block before it touches the spring is 6.0 m/s. How fast is the block moving at the instant the spring has been compressed 15 cm? k = 2.0 kN/m
 
   


   
  a.
  3.7 m/s
   
  b.
  4.4 m/s
   
  c.
  4.9 m/s
   
  d.
  5.4 m/s
   
  e.
  14 m/s


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morrie123456

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

c

Answer to Question 2

a


Wadzanai

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Reply #2 on: Jul 28, 2018
Both answers were spot on, thank you once again


morrie123456

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Reply #3 on: Jul 28, 2018
Great! Please up vote :D


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