(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A 4.32 kg block is placed on top of a 9.16 kg

block. A horizontal force of F = 66.6 N is

applied to the 9.16 kg block, and the 4.32 kg

block is tied to the wall. The coefficient of

kinetic friction between all moving surfaces

is 0.169. There is friction both between the

masses and between the 9.16 kg block and the

ground.

The acceleration of gravity is 9.8 m/s^2.

Determine Tension of string in N

(see image)

2. Relevant equations

ƩF = ma

f_{s}= μ_{k}*F_{N}

3. The attempt at a solution

(see attachment for free body diagrams)

ƩF = ma

m = 4.32 kg

a_{top block}= 0

ƩF = F_{applied}- f_{k}- T

0 = (44.274) - (7.155) - T

T = 44.274 - 7.155

T = 37.119

Apparently I did something wrong somewhere, but I'm not sure where.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: 2 blocks on top of each other, applied force, friction, and tension

**Physics Forums | Science Articles, Homework Help, Discussion**