Two weights attached to a uniform beam of mass 28kg are supported in a horizonta
ID: 2264152 • Letter: T
Question
Two weights attached to a uniform beam of mass 28kg are supported in a horizontal position by a pin and cable as shown in the figure.
What is the tension in the cable which supports the beam? the acceleration of gravity is 9.8 m/s^2. Answer in units of kN
A uniform solid disk of radius R is set into rotation with an angular speed ?i about an axis through its center. While still rotating at this speed, the disk is placed into contact with a horizontal surface and immediately released as shown in the figure below. What is the angular speed of the disk once pure rolling takes place? (Use the following as necessary: Find the fractional change in kinetic energy from the moment the disk is set down until pure rolling occurs. Assume the coefficient of friction between disk and surface is ?. What is the time interval after setting the disk down before pure rolling motion begins? (Use the following as necessary: R, ?i, ? and g. How far does the disk travel before pure rolling begins? (Use the following as necessary: R, ?i, ? and g.Explanation / Answer
moment balance
(35*2.5+55*8.3)*9.8=T*sin(37 degrees)*8.3
==> T=1067,29 N
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