What is an object doing at the moment its instantaneous acceleration is zero?

a. resting

b. changing direction

c. traveling downward

d. accelerating

Option A

Explanation:

Acceleration is defined as the rate of change of the vellocity.

Then, if the acceleration is equal zero, the object has a constant velocity or a velocity equal to zero (also constant, of course)

Then, te correct option would be option A; resting, because an object resting has instantaneuos acceleration of zero.

c)as speed changes, wavelength and frequency change.

everything changes!

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