In the combustion process, the explosion pushes the piston down
Air pressure or water pressure makes water move.
the gravity stops them from floating away
Gravity
The pull of gravity makes surface material move in the form of erosion, mass wasting, or landslides. Gravity acts as a constant force that causes materials to be pulled downward or moved along sloped surfaces.
force of gravity
By "capillary action."
Gravity
An external force (like magnetic field or gravity)
Towards the center of the Earth.
Gravity is the force that makes the car move faster down the slope. As the car descends, gravity pulls it downhill, increasing its speed. The steeper the slope, the greater the acceleration due to gravity.
When you go against gravity, such as jumping up in the air or climbing stairs, you are using muscular force to overcome the force of gravity pulling you down. Your muscles work to counteract gravity and help you move in the opposite direction.
Gravity is the primary force that causes objects to move downhill. Objects are pulled downward towards the center of the Earth by gravity, accelerating them as they move downhill.