How does gravity effect a firework on its way up?

Gravity acts as a force that pulls the firework downward throughout its ascent. As the firework is launched, it initially overcomes gravity due to the thrust generated by the propellant. However, as it rises, gravity gradually slows its ascent until it reaches its peak height, where the upward momentum is completely countered by gravitational force. After reaching this apex, gravity then causes the firework to fall back down, leading to its eventual explosion at the peak.