Q7-MTE

7. A 12 kg tree branch breaks off a tree during a storm, and falls 22 m to the ground. a. Ignoring air friction, what is the speed of the branch when it hits the ground? (Solve using the conservation of mechanical energy). b. How much force is exerted by the ground if the branch sinks 0.17 m into the soft ground? (Solve using the conservation of mechanical energy law).