In the Cavendish balance apparatus shown in Figure 13.4 in the textbook, suppose that m1 = 1.50 kg, m2 = 27.0 kg, and the rod connecting each of the pairs of masses is 31.0 cm long. Once the system reaches equilibrium, each pair of masses, m1 and m2, are separated by a distance of 13.0 cm center-to-center. A. Find the magnitude of the net force on one of the small masses, m1. B. Find the gravitational torque (about the rotation axis) on the rotating part of the apparatus. Ignore any forces on the connecting rods in your calculation. C. Suggest some ways to improve the sensitivity of this experiment.
Gravitational force
In nature, every object is attracted by every other object. This phenomenon is called gravity. The force associated with gravity is called gravitational force. The gravitational force is the weakest force that exists in nature. The gravitational force is always attractive.
Acceleration Due to Gravity
In fundamental physics, gravity or gravitational force is the universal attractive force acting between all the matters that exist or exhibit. It is the weakest known force. Therefore no internal changes in an object occurs due to this force. On the other hand, it has control over the trajectories of bodies in the solar system and in the universe due to its vast scope and universal action. The free fall of objects on Earth and the motions of celestial bodies, according to Newton, are both determined by the same force. It was Newton who put forward that the moon is held by a strong attractive force exerted by the Earth which makes it revolve in a straight line. He was sure that this force is similar to the downward force which Earth exerts on all the objects on it.
In the Cavendish balance apparatus shown in Figure 13.4 in the textbook, suppose that m1 = 1.50 kg, m2 = 27.0 kg, and the rod connecting each of the pairs of masses is 31.0 cm long. Once the system reaches equilibrium, each pair of masses, m1 and m2, are separated by a distance of 13.0 cm center-to-center.
A. Find the magnitude of the net force on one of the small masses, m1.
B. Find the gravitational torque (about the rotation axis) on the rotating part of the apparatus. Ignore any forces on the connecting rods in your calculation.
C. Suggest some ways to improve the sensitivity of this experiment.
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