Final answer:
The seatbelt scenario showcases Newton's First Law of Motion, as in a car accident, a person's body would continue to move at a constant speed due to inertia unless acted upon by an external force, like a seatbelt. The sensation of being pushed back into a seat during a jet takeoff is also due to Newton's First Law as the body's inertia resists the acceleration of the jet. Newton's Third Law is exemplified when a car's wheels push on the ground and the ground pushes back, allowing the car to move forward.
Step-by-step explanation:
Understanding Newton's Laws in Real-Life Scenarios
The scenario described, where you have to wear a seatbelt to prevent flying through the windshield in a wreck, is a demonstration of Newton's First Law of Motion which is often termed the law of inertia. This law states that an object will maintain its state of rest or uniform motion unless acted upon by an external force. In the context of a car accident, if the car suddenly stops due to a collision, a person inside the car will continue to move forward at the same speed unless restrained by a seatbelt, which is the external force in this scenario.
When discussing a jet taking off, we often feel as though we are being pushed back into our seats. This sensation is a result of our bodies' inertia according to Newton's First Law. Because our bodies tend to remain at rest while the seat accelerates forward, there is no actual backward force on us, it is the seat that moves forward pushing against our backs.
Furthermore, Newton's Third Law of Motion, which states that for every action, there is an equal and opposite reaction, can be seen in examples such as a teacher walking and causing a reaction force that propels them forward. Similarly, a car's wheels push backward on the ground while the ground pushes the wheels forward, allowing the car to accelerate.