Physics qeastions true / false and explain why please BEST ANSWER GETS 10!?

5 qeastions below answer true or false and explain why? thanks!





Velocity is always positive?





Gravity does not exist in a vacuum?





Velocity is classified as a force?








Acceleration and velocity are the same?








If velocity is zero then acceleration must be zero too?





THANKS BEST ANSWERS 10 POINTS!Physics qeastions true / false and explain why please BEST ANSWER GETS 10!?
Velocity is always positive:


False, velocity has a magnitude and direction. The direction of the velocity vector can be in the negative direction, thus making the velocity negative.








Gravity does not exist in a vacuum:


False, gravity is generated from anything that has mass. Gravity is completely independent of what is inside of the vacuum.








Velocity is classified as a force:


False, by definition a force from first principles follows the equation: Force = mass * acceleration








Acceleration and velocity are the same:


False, acceleration is the rate at which velocity is changing.








If velocity is zero then acceleration must be zero too:


False, if the velocity of an object is zero, it can still be de/accelerating.

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