Question

how does newtons first law apply when you run into a wall on a motorcyle using the word Gravity

Answer 1

Newton's First Law, also known as the law of inertia, states that an object at rest will remain at rest and an object in motion will continue in motion with the same speed and in the same direction unless acted upon by an external force.

When you run into a wall on a motorcycle, your body and the motorcycle are both in motion due to the speed at which you were traveling. According to Newton's First Law, both your body and the motorcycle would continue moving forward at that speed unless acted upon by an external force. In this case, the wall acts as that external force, abruptly stopping the motorcycle.

Gravity plays a critical role in this scenario as well. While you are traveling forward, gravity is constantly acting on your body, pulling it down toward the ground. However, when you collide with the wall, the wall exerts a powerful opposing force that causes a rapid deceleration. Since your body is still in motion forward and is not immediately stopped by the wall, your body may continue to move forward due to inertia even though the motorcycle has stopped. If not restrained, you may end up being thrown forward despite the wall's presence, which further illustrates the concept of inertia.

In summary, when you collide with a wall on a motorcycle, Newton's First Law explains how your body and the motorcycle were in motion and how the wall's force acted to stop them. Gravity influences your body’s motion and the outcome of the collision as well, playing a role in how your body may respond to the sudden stop.