Recent content by Todd88

Homework Statement A light string is wrapped around the outer rim of a solid uniform cylinder of diameter 75.0cm that can rotate without friction about an axle through its center. A 3.00kg stone is tied to the free end of the string. When the system is released from rest, you determine that...

Ah...so I = 1/2MR^2. Thanks a lot!

Homework Statement A grinding wheel in the shape of a solid disk is 0.240m in diameter and has a mass of 2.50kg. The wheel is rotating at 2050rpm about an axis through its center. What is its kinetic energy? How far would it have to drop in free fall to acquire the same amount of kinetic...

...nvm I am only suppose to use the y-components for some reason. Thanks.

Homework Statement Using the total moment of inertia of the system, find the total kinetic energy of the system. Here is the diagram: Homework Equations Find the total kinetic energy of the system using m, r, w. The Attempt at a Solution For particle a, I found the x and y...

Ah of course. Thanks a lot guys you really helped!

Homework Statement Okay for some reason I guess I don't understand this problem. Here is the question: A 7.50kg shell at rest explodes into two fragments, one with a mass of 1.50kg and the other with a mass of 6.00kg. If the heavier fragment gains 100J of kinetic energy from the...

EDIT:: sorry I figured it out. Thanks! :)

Homework Statement A sled with rider having a combined mass of 130kg travels over the perfectly smooth icy hill shown in the accompanying figure. Homework Equations How far does the sled land from the foot of the cliff? The Attempt at a Solution Honestly, I have no idea how to...

Ah of course. I knew that. Thanks!

It would be simple but am I correct in saying the average acceleration (deceleration in this case) is -.12m/s^2? Because when I do -.12*305 it is not correct. The friction force would be -37.3N which is incorrect.

-.12m/s

Homework Statement A loaded 305kg toboggan is traveling on smooth horizontal snow at 4.60m/s when it suddenly comes to a rough region. The region is 9.00m long and reduces the toboggan's speed by 1.10m/s. Homework Equations What average friction force did the rough region exert on the...

Wait you edited your answer and now it's confusing. For the y components, wouldn't it just be 705.6? The x components would be different for both angles but how would they even out to 0?

T1 and T2 would be different values correct? So I would have to do a system of equations first solving for either T1 or T2 and then plug those in?