Question:
why x component remains constant throughout the projectile and y component can change
Answer:
In a projectile motion, there is acceleration in vertical direction only which is equal to g.
Which shows the change in velocity of vertical component.
The acceleration in horizontal direction is zero, so there is no acceleration in horizontal direction which means the horizontal component of velocity is constant at all time.
Because, Acceleratio = change in velocity / time
So, zero acceleration shows no change in velocity, means constant velocity.
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