A load of bricks with mass m1= 14.2 kg hangs from one end of a rope that passes over a small, frictionless pulley.  A counterweight of mass m2 = 27.0 kg is suspended from the other end of the rope, as shown in the figure. The system is released from rest. Use g = 9.80 m/s^2 for the magnitude of the acceleration due to gravity.                                      1)What is the magnitude of the upward acceleration of the load of bricks?  2)What is the tension in the rope while the load is moving?

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Conservation of Energy

In physics, the rule of the conservation of energy states that energy doesn’t disappear from the atmosphere; instead, it changes its form from one type to another. Energy is one of the most important physical quantities in nature, and it cannot be created or destroyed — only transformed.