If only an external force can change the momentum of the center of mass of an object, how can the internal force of the engine accelerate a car?
We have to explain the reason behind how do the internal force by the engine of the car accelerate it without the help of an external force.
Step 1 of 2
Newton's first law: A body continues in its state of rest or of uniform motion unless and until it is acted upon by an external force.
Law of Conservation of linear momentum: In the absence of external forces acting on the system, the final momentum of the system is equal to the initial momentum of the system.
Law of conservation of energy: The total amount of energy in an isolated system remains constant. It can only be converted from one form to other.
Textbook: Physics: Principles with Applications
Author: Douglas C. Giancoli
This textbook survival guide was created for the textbook: Physics: Principles with Applications, edition: 6. Physics: Principles with Applications was written by and is associated to the ISBN: 9780130606204. The full step-by-step solution to problem: 18Q from chapter: 7 was answered by , our top Physics solution expert on 03/03/17, 03:53PM. Since the solution to 18Q from 7 chapter was answered, more than 320 students have viewed the full step-by-step answer. The answer to “If only an external force can change the momentum of the center of mass of an object, how can the internal force of the engine accelerate a car?” is broken down into a number of easy to follow steps, and 28 words. This full solution covers the following key subjects: Force, external, center, change, engine. This expansive textbook survival guide covers 35 chapters, and 3914 solutions.