Compressional stress
Well, a specific rock takes up a specific amount of space, as well as a specific shape. Depending on the type of rock, you can change that definite shape by chipping or cracking it.
1. breaking a rock in half 2. ripping a piece of paper
it is called a water ring and it forms because of the force that the rock falls at and the shape
the force, otherwise the rock would not move.
Shape of rock also changes because of stress. It causes the rock to change its shape. When a lot of pressure applies it causes the rock to change its shape.
the force that acts on rock to change its shape or volume is stress.
Mechanical change
A force that acts on rock to change its shape or volume called stress. Tension is the stress that sketched rock so that is becomes thinner in the middle.
Erosion
Weathering
The force causing the change in the shape of rock is called stress. The change of shape in the rock is called strain. If the stress does not cause a permanent change in the shape of rock, it is called elastic deformation. If the change is permanent, it is called plastic deformation.
stress
I believe pressure is the answer you are looking for here. Other forces that change the shape of rocks include weathering and erosion.
Deformation is a change in the shape and volume of a rock, deformation is produced when a rock experiences a stress that is greater than the strength of the rock.
Heat, pressure, weather, gravity, plate tectonics--all play a part in the rock cycle.
Mechanical weathering occurs when an applied force causes rock to break.