A vertical spring ( k=2000N/m) is initially compressed 10cm from its equilibrium position by a 4kg block is fired vertically from rest. The speed of the block in ( m/s) as it moves through the equilibrium position of the spring (where y=0 ) is 13.7 2.24 2.64 1.73 3 A car rounds a curve with a speed of 13.4m/s without skidding. If the radius of the curve is 50m, that angle of the banked curve should be: 8 68.5 12.2 19.75 1.6