Register to reply

Inertial forces in pistons

by jonnygeordie
Tags: forces, inertial, pistons
Share this thread:
Aug17-09, 08:32 AM
P: 2
Ok so here's the question im looking at.
A piston and cylinder mechanism is connected to a crank shaft. The crank is 50mm long, the connecting rod 250 mm long and the piston has a mass of 150g. If the engine speed is w rad/sec and the crankshaft torque T Nm calculate:-

i) Max inertial force between the piston and connecting rod
ii) Max. force in the connecting rod

My question is where to start.

I know
Angular momentum = Inertia x w

Force = Torque/ distance

Torque = angular momentum x Inertia

Now for the seond pat of the question, combining two of the above equations i get

Force = (angular momentum X inertia) / distance.

The problem is i have no idea where to start, if someone could give me a startpoint i would be greatfull. Im sure once i have that then the rest will fall into place
Phys.Org News Partner Science news on
Experts defend operational earthquake forecasting, counter critiques
EU urged to convert TV frequencies to mobile broadband
Sierra Nevada freshwater runoff could drop 26 percent by 2100

Register to reply

Related Discussions
Invariance of scalar dot product across inertial and non-inertial frames General Physics 0
Inertial forces Introductory Physics Homework 5
Inertial and Non-Inertial Frames of Reference Question Introductory Physics Homework 6
Is centripetal force present in inertial and non-inertial frames? General Physics 1