• Part A The mass of a regulation tennis ball is 57.0g (although it can vary slightly), and tests have shown that the ball is in contact with the tennis racket for 30.0 ms. (This number can also vary, depending on the racket and swing) We shall assume a 30.0 ms contact time throughout this problem. The fastest-known served tennis ball was served by "Big Bir Tilden in 1931, and its speed was measured to be 73.14 m/s. What impulse did Big Bill exert on the tennis ball in his record serve? kg m/s Submit Bequest Answer Part B What force did Big Bill exert on the tennis ball in his record serve? ? Submit Bequest Answer • Part C If Big Bill's opponent returned his serve with a speed of 55.0 m/s, what is the magnitude of the force that he exerted on the ball, assuming only horizontal motion? Va AE F= 7.296 Submit Previous Anawera Bequest Answer X Incorrect; Try Again; 5 attempts remaining Part D If Big Bill's opponent returned his serve with a speed of 55.0 m/s, what is the magnitude of the impulse that he exerted on the ball assuming only horizontal motion? ΑΣφ
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.
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