A spring is mounted against a block. The block is pushed with a force until it moves 3 = 1.5 171.. When 3 = O, the block is at rest and the spring is uncompressed. The contact surface is smooth. Values for the figure are given in the following table. Note the figure may not be to scale. Variable Value F 625 N m. 20 kg k 250 Nr' m Using equations of motion in rectangular coordinates, 3.. Find an equation for the horizontal acceleration as a function of 5, {1(3) . b. Determine the velocity of the block at 3 = 1.5 m., o