(22) A designer is trying to determine the type of wire to use for a pendant light that will hang from the ceiling of an elevator. The wire can withstand a force of 70.0 N before breaking. Therefore, the upward directed force on the lamp, called tension, cannot exceed 70.0 N. The lamp also experiences a 60.0-N gravitational force, called weight, in the downward direction. What is the maximum upward acceleration the elevator can have before the wire breaks? The lamp has a mass of 6.1 kg. (23) Two friends are pushing an 18-kg crate across the floor. One of them applies a force of 75.0 N to the left, and the crate moves at a constant speed. What force must the other person be applying, and in what direction does the force act? (24) A trapeze is a short, horizontal bar held up by two vertical ropes on either side. An acrobat with a mass of 60.0 kg provides a 588-N downward force on the bar. Each of the two trapeze ropes provides an upward force of 349 N. What is the upward acceleration of the acrobat? C

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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.