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Mastery Assess It 12
Middle School Physical Science - S2 - MI, T2 / Work, Energy, and Power / Lesson 119
4. Which of the following is not a true statement?
O The mechanical energy of an object is greater than the potential energy of an object.
The mechanical energy of an object is less than the kinetic energy of the object.
The potential energy of an object is the same as the mechanical energy of an object.
O O
The kinetic energy of an object is the same as the potential energy of an object.

Asilver dollar is dropped from the top of a building that is 1324 feet tall. use the position function below for free-falling objects. s(t) = −16t2 + v0t + s0 (a) determine the position and velocity functions for the coin. s(t) = v(t) = (b) determine the average velocity on the interval [1, 2]. ft/s (c) find the instantaneous velocities when t = 1 second and t = 2 seconds. v(1) = ft/s v(2) = ft/s (d) find the time required for the coin to reach the ground level. (round your answer to three decimal places.) t = s (e) find the velocity of the coin at impact. (round your answer to three decimal places.) ft/s