Question

in projectile motion we resolve vectors in which conditions

Answer 1

, we will consider x- and y-directed displacements, velocities, and accelerations.

The projectile will accelerate under the influence of gravity, so its y-acceleration will be downward, or negative, and will be equal in size to the acceleration due to gravity on Earth.

There will be no acceleration in the x-direction since the force of gravity does not act along this axis.

On Earth the acceleration due to gravity is 9.8 m/s2 directed downward. So, for this presentation acceleration in the y-direction, or ay, will be -9.8 m/s2, and acceleration in the x-direction, or ax, will be 0.0 m/s2.

Two dimensional acceleration: 9.8 m/s2, downward
X-acceleration: 0 m/s2
Y-acceleration: -9.8 m/s2