A 4.00-kg mass is attached to a spring hanging vertically and ...

[stock]

A 4.00-kg mass is attached to a spring hanging vertically and hangs at rest in the equilibrium position.
 
  The spring constant of the spring is 1.00 N/cm. The mass is pulled downward 2.00 cm and released. What is the speed of the mass when it is 1.00 cm above the point from which it was released?
  A) 0.0443 m/s
  B) 0.0744 m/s
  C) 0.0201 m/s
  D) 0.0866 m/s
  E) The mass will not reach the height specified.

Question 2

What is 56 + ( 32.00 )/(1.2465 + 3.45 ) written with the correct number of significant figures?
 
  A) 62.8
  B) 62.812
  C) 62.81
  D) 63
  E) 62.8123846

[onowka]

Answer to Question 1

D

Answer to Question 2

D