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A 200.g block on a horizontal, frictionless surface is located between two unstrained springs. The spring...

A 200.g block on a horizontal, frictionless surface is located between two unstrained springs. The spring on the left of the block has a spring constant of 35N/m and the spring on the right has a constant of 85N/m. a) How much work must be done by an external force to displace the block 3.0cm to the left? b) If the block is released from the above position, how fast will the block be moving when it returns to the equilibrium position? c) What will the frequency of oscillation be

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