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1. A 2.0 kg block sliding on a frictionless horizontal surface is attached to one end of a horizontal spring (k = 600 N/m) which has its other end fixed. The speed of the block when the spring is extended is 0.20 m is equal to 3.0 m/s. What is the maximum speed of this block as it oscillates? (Or speed when the spring is fully relaxed?)
2. A 10 kg object is dropped from rest. After falling a distance of 50 m, it has a speed of 26 m/s. What is the change in total mechanical energy caused by the dissipative air resistive force on the object during this descent?
The answer is given below
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