A 0.30 kg mass is suspended on a string. In equilibrium the mass ...

[mspears3]

A 0.30 kg mass is suspended on a string. In equilibrium the mass stretches the spring 2.0 cm downward. The mass is then pulled an additional distance of 1.0 cm down and released from rest.
 
  (a) Write down its equation of motion.
  (b) Calculate the velocity of the mass at T/3 s.

Question 2

The net direction in which electrons flow through a circuit is:
 
  A) the direction of the conventional current.
  B) opposite of the direction of the conventional current.

[cdmart10]

Answer to Question 1

(a) y = -0.01 cos(22.1 t) meters
(b) 0.19 m/s

Answer to Question 2

B

[mspears3]

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