Go Back   Physics Help Forum > College/University Physics Help > General Physics

General Physics General Physics Help Forum

Reply
 
LinkBack Thread Tools Display Modes
Old Feb 27th 2017, 11:24 PM   #1
Junior Member
 
Join Date: Feb 2017
Posts: 1
Please help

A scale model car will slide through a vertical circular loop. You have a team that has built a model car, which has a mass of 9kg. What is the minimum force the track must exert on the car at the bottom of the loop for the car to make it all the way around the loop without falling off? Assume effects of friction and air resistance are negligible.
physicsluver is offline   Reply With Quote
Old Feb 28th 2017, 05:12 AM   #2
Senior Member
 
Woody's Avatar
 
Join Date: Jun 2016
Location: England
Posts: 314
The key is what centripetal acceleration is required at the top of the loop to stop the car from falling?

Ignoring friction etc. means the speed and thus the centripetal acceleration is the same size (but in the opposite direction) at the bottom of the loop.

Now simply use F=ma
Woody is offline   Reply With Quote
Reply

  Physics Help Forum > College/University Physics Help > General Physics



Thread Tools
Display Modes



Facebook Twitter Google+ RSS Feed