For horizontally-launched projectiles, the acceleration is constant in both directions; option B.
Projectiles are objects which are launched into space and allowed to fall freely under the effect of gravity.
The motion of projectiles is known as projectile motion.
The path of a projectile motion is a parabola.
When an object or a ball is launched into the air, it moves with a constant downward acceleration.
The direction of acceleration due to gravitational force of the earth is constant in both directions.
Therefore, since the acceleration in the x-axis is zero and acceleration in the y-axis is -s -9.8 m/², the acceleration is constant in both directions.
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