Explain why, in terms of forces, there is a risk of head injury when diving from this height. Suggest why the high divers would choose to enter the water feet first.

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?

J. j. thomson’s experiment disproved the theory that an atom

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?