"He reasoned that if you couldn’t see the background, there’d be no way of knowing that the ball and the feathers were being accelerated towards the Earth. "The “happiest thought of his life” was this the reason the bowling ball and the feather fall together is because they’re not falling. "But Einstein imagined the scene very differently. "Isaac Newton would say that the ball and the feather fall because there’s a force pulling them down: gravity,’ Professor Cox said.
His Special Theory of Relativity argued that items would not be falling but standing still due to lack of force acting on them. Professor Cox also used the bowling ball and feather to prove a hypothesis put forward by Albert Einstein. After the collision, the cue ball moves at an angle o -58.9° with respect to its original direction, and the 8-ball moves at an angle 0 31.1° with respect to the original direction of the cue ball. "He took a heavy object, and a light one, and dropped them at the same time to see which fell fastest."Īlthough Galileo’s experiment proved two similarly shaped objects would fall at the same speed despite being different weights, he didn’t have access to a vacuum chamber in the 17th Century to conduct Professor Cox's more extravagant experiment. In a game of billiards, the cue ball, which has an initial speed of 1.3 m/s, collides with the 8-ball, which is initially at rest. "Galileo’s experiment was simple," he explains. He alludes to the earlier experiment by Galileo that tested the same hypothesis. Copy this diagram.In this initial experiment the bowling ball drops straight to the ground whereas the feathers float, owing to air resistance. (e) In the case of an inelastic collision between the two balls, Figure 7.36 is replaced by Figure 7.37. The initial momentum of the white ball is $\vec$ After the collision, the balls move off with an angle $\theta$ between them, as shown in Figure 7.35. (c) Draw properly scaled vector that represents the velocity of the black ball after the collision: Show your work using words, diagrams, etc_Ī white billiard ball collides with a black billiard ball that is initially at rest. () Draw properly scaled vector that represents the total momentum of the system (including the LWO blue pieces and the black ball) after the colli- sion: Show your work using ` words, diagrams etc_ The velocity of one of the broken pieces after the collision is identical to the velocity of the black ball before the collision Before After
The velocities are drawn to scale: The velocity of the black ball (8 ball) after the colli- sion is unknown. Two identical billiard balls collide: The blue ball breaks into two even pieces The velocities of both balls before the collision, and the two pieces of the blue ball after the collision are given in the diagrams below.
Points) Bill Yards, the astronaut is playing a game of space billiards in outer space, far from any oth- objects. (c) Draw properly scaled vector that represents the velocity of the black ball after the collision: Show your work using words, diagrams, etc () Draw properly scaled vector that represents the total momentum of the system (including the LWO blue pieces and the black ball) after the colli- sion: Show your work using ` words, diagrams etc Show your work using words, diagrams, etc The velocity of one of the broken pieces after the collision is identical to the velocity of the black ball before the collision Before Afterĭraw properly scaled vector that represents the total momentum of the system (including both balls) before the collision. SOLVED: points) Bill Yards, the astronaut is playing a game of space billiards in outer space, far from any oth- objects.
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