A box slides from rest down a curved slope. Its Initial height is 32m above the
ID: 1485489 • Letter: A
Question
A box slides from rest down a curved slope. Its Initial height is 32m above the ground, and it comes off the slope 7_m above the ground. How fast is the box moving as it leaves the slope? Assume friction is negligible A disk (with uniform density) is shown below-right. Its rotation axis is the "natural axis through its center. The disk is Initially at rest, and it then takes 120 s to reach an angular velocity of 8 rev/s. Find the mass of the disk. For the uniform steel beam shown, M = 2200_kg, m = 520_kg, R = 6.3_m, and r = 1.2_m. Find the support force from beam B.Explanation / Answer
only 1 question at a time please
6)
use conservation of energy
potential energy at top + kinetic energy at top = potential energy at bottom + kinetic energy at bottom
m*g*h1 + 0 = m*g*h2 + 0.5*m*v^2
g*h1 = g*h2 + 0.5*v^2
v^2 = 2*g*(h1-h2)
v^2 = 2*9.8*(32-7)
v = 22.14 m/s
Answer: d
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