C. 33.5 N
D. 64.7 N
E. 294 N
N=mg <—–not sure about that because I know normal force changes depending on the situation but I think this applies here.
Also my teacher has us use g= 9.8 NOT 9.81
3. So first I calculated the normal force: N=mg —–> (30)(9.8) = 294 N
Then I put my normal force into the equation F=μ*N ——> (.15)(294)= 44.1 N
This was not one of the answer choices. However I recalled this equation : Fs≤μs*N.
Since I was solving for the force that was a minimum I assumed that out of my answer choices C. 33.5 N was correct because 33.5 ≤ 44.1 which was my calculated force. This turned out to be the correct answer on the answer sheet. However I feel that this was more of a guess that happened to be right rather than the correct way of doing this.
Any help is appreciated!