17. A 10 kg mass is placed on an inclined plane. s = 0.50 k = 0.28
The angle of incline is 40 degrees.
a. Does the mass move? yes
b. How much friction acts on the mass? 21.0
c. What is the acceleration of the mass? 4.2
d. What minimum force must be applied to prevent the mass from moving? 25.5
e. What is the minimum force would I have to apply to get the mass to move up the incline? 100.5
The numbers besides the questions are the answers my teacher put up. However, I am getting completely different answers after a. So am I doing it wrong, or is the answer key wrong? som

Question

17. 	A 10 kg mass is placed on an inclined plane. s = 0.50 k = 0.28
        The angle of incline is 40 degrees.
a. 	Does the mass move? yes
b. 	How much friction acts on the mass? 21.0
c. 	What is the acceleration of the mass? 4.2
d. 	What minimum force must be applied to prevent the mass from moving? 25.5
e. 	What is the minimum force would I have to apply to get the mass to move up the incline? 100.5
The numbers besides the questions are the answers my teacher put up. However, I am getting completely different answers after a. So am I doing it wrong, or is the answer key wrong? som

azureilai · Answer

the s  is the static friction coefficient and the k is the kinetic friction coefficient