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Q3) A block of mass 1.6 kg is attached to one end of a spring (with spring constant 10 N/m) whose other end is fixed toa wall. The block sits on a frictionless table. The mass is pulled 0.9 m from it's equilibrium position and released. What is the force acting on the block when it is travelling at it's maximum velocity?N/m What is the magnitude of the force acting when the block has a speed of half of it's maximum value?

Fig: 1