A binary star system consists of two stars of masses m1 and m2. The stars, which gravitationally attract each other, revolve around the center of mass of the system. The star with mass m1 has a centripetal acceleration of magnitude a1.Note that you do not need to understand universal gravitation...
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Two 1.3 kg masses are 1.2 m apart (center to center) on a frictionless table. Each has + 9.9 \mu C of charge.What is the magnitude of the electric force on one of the masses?
Two circular loops of wire, each containing a single turn, have the same radius of 5.0 cm and a common center. The planes of the loops are perpendicular. Each carries a current of 1.9 A. What is the magnitude of the net magnetic field at the common center?
BioMechanics similar to Physics
In Fig. 9.6, a weightlifter's barbell consists of two identical spherical masses each withradius 0.17 m and mass of 50 kg. The weights are connected by a 0.96-m steel rod withmass of 12 kg. Find the moment of inertia of the barbell through the axis at the center.