The frame of a tandem drum roller has a weight of 4000 lb excluding the two rollers. Each roller has a weight of 1500 lb and a radius of gyration about its axle of 1.25 ft. If a torque of M = 300 lb # ft is supplied to the rear roller A, determine the speed of the drum roller 10 s later, starting from rest.
Lecture 11: Fluids/Thermodynamics Outcomes Explain the different pressures and calculate o Atmospheric pressure o Absolute pressure o Gauge pressure o Hydrostatic pressure o Vacuum pressure Pressure Normal force exerted per unit area by a fluid Where o P = pressure (scalar) o F = normal force (vector) o A = area (vector!) SI units: N/m = Pascal [Pa] US: lb fin = psi Also bar, mm Hg, in Hg, torr (see unit conversion sheet) Pressure Example 1 Pressure - Types & Relationships Atmospheric [P atm - pressure exerted at a certain location o Standard atmospheric pressure = 1 atm (at sea level)