Answer:
α = -0.01625 rad / s²
Explanation:
This is an exercise in angular kinematics, we can use the relation
w = w₀ + 2 α θ
linear and angular variables are related
v = w r
w = v / r
Let's reduce the magnitudes to the SI system
v₀ = 91 km / h (1000m / 1km) (1h / 3600s) = 25.278 m / s
v = 48 km / h = 13,333 m / s
θ = 75 rev (2π rad / 1 rev) = 471.24 rad
Let's find the angular velocities
w₀ = v₀ / r
w₀ = 25.278 / 0.78
w₀ = 32,408 rad / s
w = v / r
w = 13.333 / 0.78
w = 17.09 rad / s
we calculate the angular acceleration
α = (w- w₀) / 2θ
α = (17.09 - 32.408) / (2 471.24)
α = -0.01625 rad / s²
the negative sign indicates that the wheel is stopping
Answer:
** incident ray.
Incident ray - the ray of light falling on the surface AB is called the incident ray
reflected ray.
** Reflected ray - the incident ray bouncing back in the same medium after striking the reflecting surface is called reflected ray.
The shear connectors must transfer axial shear stress completely. The minimum slip value is needed to limit the maximum slip at the ultimate limit state.
<h3>
What is shear connection?</h3>
A shear connection is a type of join which allows the transfer of shear forces between two members of beams or truss.
The shear connectors are used in composite beam is to transfer the longitudinal shear stresses at the interface between the steel beam and the concrete slab.
The slip requirements are less than in a propped beam. The higher strains resulting in the bare steel section carrying the construction
Thus, minimum slip value is needed to limit the maximum slip at the ultimate limit state.
Learn more about shear connection.
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