At each moment during its flight, a projectile has a velocity v and an acceleration a. The components of these variables are:(adsbygoogle = window.adsbygoogle || []).push({});

vx = x component of the velocity

vy = y component of the velocity

ax = x component of the acceleration

ay = y component of the acceleration

Which of these components remain constant throughout the motion? Assume that air resistance is absent.

None of the variables is constant.

Only vx and ay are constant.

vx, ax and ay are constant.

vy, ax and ay are constant.

Only ax and ay are constant.

My answer:

vy, ax and ay are constant.

is this correct? i know for sure ax is constant at 0m/s and ay is constant at +-9.8m/s,.... but i think Vy instead of Vx would be constant because of gravity (ay) ... am i right?

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# Homework Help: Constant variables in projectiles

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