In his lifetime, Isaac Newton came up with three laws of motion. The first law of motion states that an object in motion remains in motion at a uniform velocity or an object at rest remains at rest unless acted upon by an external force. This law is also known as the law of inertia. This law basically means that in the absence of friction, a body in motion at a particular speed will remain at the same speed and direction unless it is acted upon by an external force. If there is no net force that is brought about by unbalanced forces acting on a body, the body remains in a constant velocity. If the body was not in motion then it will remain in that state unless an external force acts on it (Nancy, 2015). Some of the practical examples of this law of motion are when the motion of a kite changes when the wind changes or the motion of a falling ball.
The second law of motion states that the change of motion is equal to the force applied and is usually in a straight line in which the force was applied. This law means that the new direction and motion of an object is dependent on the amount of force applied and the direction in which it is applied. When an object is not in motion and a force is applied to it, the object accelerates in the direction of the applied force. If the body is in motion, the body appears to reduce its velocity, increase its velocity or change in direction. A practical example of this law of motion is airplanes traveling through the atmosphere. To slow down, speed up or change direction, a certain amount of force is applied.
Delegate your assignment to our experts and they will do the rest.
Newton’s third law of motion states that a force is a push and a pull that is applied on an object due to an interaction with another object. This law describes the action and reaction forces. This law explains that forces always occur in pairs. When an object applies a force against another, the second object applies the same amount of force (Jim, 2017). If an object X applies a force F on a body Y, then object Y applies an equal and opposite force –F back on that object. This can be expressed as FXY= -FYX. XY shows that X exerts a force on Y and YX shows that Y exerts a force on X. the negative sign on –FXY shows that the forces are in opposite directions. The forces FXY and FYX are known as the action and reaction forces. In practice, this law is applied in rockets traveling through space. When the engines are turned on and propel the rocket forward, it results in a reaction force. The burnt fuel is pushed to the back of the rocket and it results in a force in the opposite direction that pushes the rocket forward.
Works Cited
Jim Lucas (2017). Equal and Opposite Reactions: Newton’s Third Law of Motion. Retrieved July 5, 2018, from https://www.livescience.com/46561-newton-third-law.html
Nancy Hall (2015). Newton’s First Law. Retrieved July 5, 2018, from https://www.grc.nasa.gov/www/k-12/airplane/newton1g.html
