Explain, using appropriate laws of motion, why the air exerts a force on the engine in the forward direction.

This question is taken from AQA 2016 question 1 part 2, http://filestore.aqa.org.uk/sample-papers-and-mark-schemes/2016/june/AQA-74071-QP-JUN16.PDF

The force is acting on the air by the engine. By Newton's 2nd law, force is the rate of change of momentum. The air is acted by a force, so it accelerates and has a change in magnitude.

By Newton's 3rd Law, all forces between two objects exist in equal magnitude and opposite direction. When the air is acted to the right by the engine, there is an equal and opposite force acted on the engine. The air moves backward, so the engine must move forward.

Answered by William L. Physics tutor

5205 Views

See similar Physics A Level tutors

Related Physics A Level answers

All answers ▸

A student studied how a few parameters of the electromagnetic radiation affects the I-V(current-voltage) curve of photoelectricity. By increasing one parameter he saw that the saturation current has risen. Which parameter it was?


What is the Strong Nuclear Force?


What happens to ice when energy is supplied at a constant rate in terms of the changes in energy of the molecules?


What's the difference between inertial and gravitational mass?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2024

Terms & Conditions|Privacy Policy
Cookie Preferences