Q1. A spring-loaded toy gun is used to shoot a ball of mass straight up in the air. The spring has spring constant. If the spring is compressed a distance of 25.0 centimeters from its equilibrium position and then released, ball reaches a maximum height (measured from the equilibrium position of the spring). There is no air resistance, and the ball never touches the inside of the gun. Suppose that all movement occurs in a straight line up and down along the y axis. Find out the muzzle velocity of the ball (i.e., the velocity of the ball at spring's equilibrium position).

Q2. A toaster rated at 1020W operates on a 120V household circuit and a 4m length of Nichrome wire as its heating element. The operating temperature of this element is 300°C. What is the cross sectional area of the wire?