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A block with a mass of 0.650 kg is connected to a spring, displaced in the...

A block with a mass of 0.650 kg is connected to a spring, displaced in the positive direction a distance of 50.0 cm from equilibrium, and released from rest at t = 0. The block then oscillates without friction on a horizontal surface. After being released, the first time the block is a distance of 30.0 cm from equilibrium is at t = 0.200 s.
(a) What is the block's period of oscillation?
  
1.35s

(b) What is the the value of the spring constant?
  
14 N/m

(c) What is the block's velocity at t = 0.200 s? (Indicate the direction with the sign of your answer.)
  
m/s

(d) What is the block's acceleration at t = 0.200 s? (Indicate the direction with the sign of your answer.
0 0
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