
#1
Oct3009, 06:50 PM

P: 165

1. The problem statement, all variables and given/known data
A small remotecontrol car with a mass of 1.51 kg moves at a constant speed of v = 12.0 m/s in a vertical circle inside a hollow metal cylinder that has a radius of 5.00 m. What is the magnitude of the normal force exerted on the car by the walls of the cylinder at point A (at the bottom of the vertical circle)? What is the magnitude of the normal force exerted on the car by the walls of the cylinder at point B (at the top of the vertical circle)? Do I utilize Fnet = ma which would give me 43.488N as Fnet, but I do not see how that would help? I don't know what to do. 



#2
Oct3009, 06:53 PM

P: 328

Try drawing a force diagram when the car in at the bottom of the cylinder and when its
at the top of the cylinder. 



#3
Oct3009, 07:04 PM

P: 165

For Part A, it would just be Fn pointing up and w pointing down.
w=mg so (1.51kg)(9.8) = 14.798N so Fn must be 14.798N ? Would part B basically be the same? 



#4
Oct3009, 07:13 PM

P: 66

A car goes around a vertical circle (Uniform Circular Motion)
F_y = m*a_y
a_y = v^2/r Does that help? 



#5
Oct3009, 07:13 PM

P: 328

For part A it should be N  mg = 0, right ? Since mg is pointing down thus N has to be
pointing up. For part B its not quite the same. 


Register to reply 
Related Discussions  
Vertical Circular Motion  Introductory Physics Homework  11  
Vertical Circles and NonUniform Circular Motion  Introductory Physics Homework  6  
Motion in a Vertical Circle (Pendulum)  Introductory Physics Homework  1  
Vertical Circular Motion  Introductory Physics Homework  9  
Motion in a vertical circle  Introductory Physics Homework  4 