2. Block A is being pushed up the side of a wall. Kinematics dictates that motion can only be in the y-direction. The block is observed to be accelerating upward at 4 m/s² while the forces shown on the drawing are applied. Some clever engineers made a free-body diagram (below). a. What is the mass of the block? b. What is the normal force, N, that the wall is applying to the block? c. What is the friction force, Fr, that the wall is applying to the block? d. What is the coefficient of friction between the wall and the block?

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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2. Block A is being pushed up the side of a wall. Kinematics dictates that motion can only
be in the y-direction. The block is observed to be accelerating upward at 4 m/s² while
the forces shown on the drawing are applied. Some clever engineers made a free-body
diagram (below).
a. What is the mass of the block?
b. What is the normal force, N, that the wall is applying to the block?
c. What is the friction force, Fr, that the wall is applying to the block?
What is the coefficient of friction between the wall and the block?
d.
F2
= 20 N
=
F₁ =
= 80 N
a = 4m/s²
60°
40°
A
mg = 50N
wall
F₁ = ?
N=?
X
Transcribed Image Text:2. Block A is being pushed up the side of a wall. Kinematics dictates that motion can only be in the y-direction. The block is observed to be accelerating upward at 4 m/s² while the forces shown on the drawing are applied. Some clever engineers made a free-body diagram (below). a. What is the mass of the block? b. What is the normal force, N, that the wall is applying to the block? c. What is the friction force, Fr, that the wall is applying to the block? What is the coefficient of friction between the wall and the block? d. F2 = 20 N = F₁ = = 80 N a = 4m/s² 60° 40° A mg = 50N wall F₁ = ? N=? X
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