In order to measure motion, one needs to observe? a. an object’s position at different times. b. an object’s position one time. c. an object’s size and direction.

c)as speed changes, wavelength and frequency change.

everything changes!

another example of kinetic energy would be,

kinetic energy   >     moving energy

answer   >   letter choice (c),   a hammer falling off a table.

hope that !                                         : )