UBC Engin A trebuchet uses a falling counterweight to launch a projectile. It can be thought of as a machine that converts the gravitational potential energy of the counterweight into kinetic and gravitational potential energy of the projectile. The counterweight has a mass of 100kg and drops 3m. The projectile has a mass of 3kg, and starts on the ground. When it leaves the sling, it has a height of 4m speed of 30 If the average power used in lifting the counterweight is 48W, find the time it takes to lift it from the ground to its full height. tlifting If the projectile goes from rest to its maximum speed in 1.5s. find the average power used in launching the projectile in this time period. Pprojectile W Find the efficiency of the trebuchet when it launches. Efficiency= %

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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.