Question

Teachers can u please explain to me the 3 laws of motion. I did not understand this at school.

Answer 1

first law
the body maintains its state of rest or of motion if no net force acts on it.
explanation
the first law of motion says that until a body (not moving) is not provided any force which makes it move it will never change its state of rest and even if a body is moving with constant speed it will never change its constant speed if some force don't acts on it.
second law
when a net force acts on a body, it produces acceleration in the body in the direction of the net force. The magnitude of this body is directly proportional to the net force acting on it , and inversely proportional to the mass.
explanation
the second law of motion describes that when a force acts on a body it is opposed by the friction and thus produces the acceleration and the acceleration is produced in the direction in which the force was applied and this acceleration is equal to the force acting on it and the mass of the body is inversely proportional to the acceleration inversely proportional means that if the mass of the body is less then the acceleration will be more but if the mass will be more than the acceleration will be less.
third law
every action has equal and opposite reaction
explanation
it means that if we are throwing a ball hardly on the wall it will come back with the same hardness but its direction will be opposite.