Projectile Motion & Vectors: Acceleration and Axis Conventions Explained

[Sarah00]

Homework Statement

Homework Equations

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The Attempt at a Solution

I know that the acceleration is downward always with value of 10m/s2
The answer is D? because j denote vertical axis and negative sign means downward?
[/B]

 

[Dr. Courtney]

It wouldn't hurt to write down the kinematic equations for the projectile motion in step 2.

 

[SammyS]

Homework Statement

Homework Equations

-

The Attempt at a Solution

I know that the acceleration is downward always with value of 10m/s2
The answer is D? because j denote vertical axis and negative sign means downward?[/B]

Yes.