A block of mass m is attached to a massless spring of spring constant k This system is accelerated upward with acceleration a Find elongation spring?

The elongation of the spring in this system can be calculated using Hooke's Law, which states that the force exerted by the spring is directly proportional to its elongation. The force exerted by the spring is equal to the sum of the force due to gravity and the force required to provide the upward acceleration. By equating these forces and solving for the elongation, you can find the elongation of the spring in this system.