Question

Problem 3:
A projectile is shot from the surface of Earth by means of a verypowerful cannon. If the
projectile reaches a height of 35,000 m above Earth's surface, whatwas the speed of the
projectile when it left the cannon?

Problem 4:
A 0.50-kg mass is attached to a spring of spring constant 20 N/malong a horizontal, frictionless
surface. The object oscillates in simple harmonic motion and has aspeed of 1.5 m/s at the
equilibrium position.
(a) What is the amplitude of vibration?
(b) At what location are the kinetic energy and the potentialenergy equal?