A spool of thread, free to unwind, is on a horizontal surface (with friction) and pulled directly upward (+y) at all times. The
spool rolls without slipping on the floor. The spool has a mass M, moment of inertia I, and a radius of R. Assume the string is wrapped around the spool at a radius r (where r < R). spool rolling on the floor
Which equation below is a correct expression of Newton’s Second Law ( ΣF=ma ) in the x (horizontal) -direction for this situation. Assume all the forces below are magnitudes and that to the right is considered the positive direction.
a. F_T - Ff= Max
b. F_T+Ff= Max
c. Ff= Max
Which equation below is a correct expression of Newton’s Second Law ( ΣF=ma ) in the x (horizontal) -direction for this situation. Assume all the forces below are magnitudes and that to the right is considered the positive direction.
a. F_T - Ff= Max
b. F_T+Ff= Max
c. Ff= Max
1 answer:
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Answer:
(i)
(ii)
Explanation:
Let t be the average thickness of the sheet.
Given that:
Density of the aluminum sheet is
Mass of sheet = 60.7 g
Length of sheet = 50.0 cm
Width of sheet = 30.0 cm
(i) Using, Density=Mass/Volume
Hence, the volume of the sheet is .
(ii) Now, as this aluminum sheet is in the shape of a cuboid, so the volume of the sheet is
Hence, the average thickness of the sheet is .