- #1
GiantSheeps
- 83
- 7
Homework Statement
Three blocks in contact with each other are
pushed across a rough horizontal surface by a
98 N force as shown.
The acceleration of gravity is 9.8 m/s^2. ----F--->|2kg| |7.7kg| |9.2kg|
u = 0.082If the coefficient of kinetic friction between
each of the blocks and the surface is 0.082,
find the magnitude of the force exerted on the
7.7 kg block by the 9.2 kg block.
Answer in units of N
Homework Equations
f=ma
fk=uN
The Attempt at a Solution
So i added the three masses and multiplied all of that by that acceleration due to gravity to get a normal force of 185.22
i multiplied that number by the friction to get 15.18804, and since that was the force going to the left, i subtracted that from 98 to get 82.81196
i thought that would work as a final answer because force would be consistent throughout the system, right? but i got it wrong. where did i go wrong? did i miss a step? is there something more that i need to do?
(also i tried to recreate the diagram with just typing characters, the | | are supposed to represent the blocks)