Question

state Newton's law of motion and derive its mathematical formula
a. as compared to mud floor we hurt more if we fall on the cemented floor
b.it is difficult to hold a hose which ejects large amount of water and high velocity

Answer 1

1) Every body or object will continue to remain in it's state of motion or in a state of rest until and unless an external and unbalanced force acts on it.
2) The rate of change of linear momentum of an object is directly proportional to the the rate of change of velocity with a constant mass .
3) For every actional force there is a reactional force which is equal in magnitude but opposite in direction.