A 40 kg, 5.0-m-long beam is supported by, but not attached to, the two posts in Figure P12.60. A 20 kg boy starts walking along the beam. How close can he get to the right end of the beam without it falling over?
He can walk up to 1 meter from the end without it falling over .
Mass of beam = 40 kg,
length of beam = 5.0-m
supported by, but not attached to, the two posts as shown in figure
mass of boy = 20 kg
First create the diagram as below
Then equate the clockwise and anti-clockwise torque.
Lets assume it can walk upto x m from right end , then solve for x.
The sphere of mass M and radius R in FIGURE P12.76 is rigidly attached to a thin rod of radius r that passes through the sphere at distance 12 R from the center. A string wrapped around the rod pulls with tension T. Find an expression for the sphere’s angular acceleration. The rod’s moment of inertia is negligible.
94% of StudySmarter users get better grades.Sign up for free