What is the most appropriate si unit to express the speed of a cyclist in a 10-km race?
a. km/s
b. km/h
c. cm/h
d. mm/s

Work = force × a. work b. energy c. distance d. momentum

Immediately upon reaching its lowest point, a falling pendulum bob has its greatest amount of energy, which is the initial amount of potential energy. a. heat; less than b. heat; more than c. kinetic; less than d. kinetic; more than

Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost