## 10 thoughts on “3.23”

1. Tyler Paschal says:

In the equation for rmax, when you plug in zeta, you end up having to take a square root of a negative number.

1. tutorpaul says:

Oops, that was a copy error. The equation for $r_{\textrm max}$ is found on pg. 75 of the text and it is actually given as below.

Notice the plus sign in there. Sorry about that.

2. omar.dauleh says:

Why do we neglect the weight of the cart?

1. tutorpaul says:

I've neglected the weight because of the equilibrium assumption. The problem didn't specifically state that the system begins in equilibrium, but the context of the system told me that it was appropriate. (Consider how often you see a car in a position where its springs are unstretched.)

3. ledrone says:

This problem is the same as 3.30 in the 11th edition

1. tutorpaul says:

Right you are! Did I leave it out of the calculations, or did I just forget to write it?

4. daeyoon1996 says:

To my knowledge the calculations were correct

5. amir akhlaghi says:

shouldn't the maximum velocity unit be meter per second not km/hr? You already converted it to m/s prior to solving for it.
thank you

1. tutorpaul says:

If memory serves the problem asks for the result in km/hr.