* Gravity: This is the force of attraction between the Earth and the object. It constantly pulls the object downwards, slowing it down as it travels upwards and eventually causing it to fall back to Earth.

While gravity is the dominant force, there are some other forces that might have a minor influence:

* Air Resistance: This force opposes the motion of the object through the air. It's usually small compared to gravity, but can become more significant at higher speeds.

* Wind: If there's wind, it can push the object slightly off course.

Important Note: The force acting on the body *changes direction* as it travels upwards. Initially, the force is upwards (to counteract the initial upward velocity), but once the object starts to slow down, gravity becomes the dominant force, acting downwards.