The gravity on the moon is different than on earth.
Answer:
15.666666666667 gram/cubic centimeter
To find the answer, take 55 and divide it by 1.85 to get the thickness of one card. In this case the answer would be 29.72973 cm. each.
Your answer would be D. "Mam"
Answer:
(a) N₁= 1100 N
(b) N₂ = 716.66 N
(c) μs =0.65
Explanation:
We apply Newton's first law:
∑Fx = 0
∑Fy =0
∑F : algebraic sum of the forces in Newton (N)
∑MA=0
∑MA : algebraic sum of moments at point A.(N*m)
Look at the free body diagram in the attached graph
(a) Find the magnitude of the upward normal force applied by the ground on the ladder (N₁)
∑Fy = 0 positive (+) is upward
N₁-500-600=0
N₁= 500+600 = 1100 N
(b) Find the magnitude of the horizontal normal force (N₂) applied by the wall on the ladder.
H= 3m
∑MA=0 :positive moment (+) counterclockwise
Ff(3)-N₁(4)+500(2.1)+600(2) = 0 ,Ff: friction force
(3)Ff = 1100(4)-500(2.1)-600(2)
∑Fx = 0 ,positive (+) to the right
Ff-N₂ = 0
Ff=N₂
N₂ = 716.66 N
(c) Determine the minimum possible coefficient of static friction (μs) for the ladder-ground interaction, for the ladder to remain at rest.
Ff = μs *N₁
μs = Ff /N₁
μs =716.66 / 1100
μs =0.65