A horizontal spring attached to a wall has a force constant of k = 840 N/m....

 

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A horizontal spring attached to a wall has a force constant of k = 840 N/m. A block of mass m = 1.90 kg is attached to the spring and rests on a frictionless, horizontal surface as in the figure below. ww www x = 0 m x= x/2 x= x (a) The block is pulled to a position x; = 5.60 cm from equilibrium and released. Find the potential energy stored in the spring when the block is 5.60 cm from equilibrium. J (b) Find the speed of the block as it passes through the equilibrium position. m/s (c) What is the speed of the block when it is at a position x/2 = 2.80 cm? m/s A horizontal spring attached to a wall has a force constant of k = 840 N/m. A block of mass m = 1.90 kg is attached to the spring and rests on a frictionless, horizontal surface as in the figure below. ww www x = 0 m x= x/2 x= x (a) The block is pulled to a position x; = 5.60 cm from equilibrium and released. Find the potential energy stored in the spring when the block is 5.60 cm from equilibrium. J (b) Find the speed of the block as it passes through the equilibrium position. m/s (c) What is the speed of the block when it is at a position x/2 = 2.80 cm? m/s