Question

If the acceleration of an object is negative then its velocity is also negative. Select one: O True O False

Answer 1

False

Step-by-step explanation:

Now, consider the projectile motion on a horizontal plane, then the acceleration is taken negative throughout the motion,
`a=g=-9.8ms^(-2)` but the velocity is not necessary to be negative in this situation.

Because in this situation, the horizontal velocity does not depend on the acceleration.

`v_(x)=vcos\theta=constant`

And, the vertical velocity is also positive but decreasing.

`v_(y) = vsin\theta - gt`

Therefore, if the object's acceleration is negative then it's velocity can be positive or constant.