Which two types of energy does a book have as it falls to the floor

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?

The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg · s2). use g = 9.80 m/s2 and calculate the mass m of the ball.

Complete the sentence to describe the law of conservation of energy. the law of conservation of energy states that energy cannot be created