straight, smooth, and polished, and having lined it with parchment, also as Investigating factors that affect the bounce height of a squash ball, Factors Affecting the Speed of a Car after Freewheeling down a Slope. Stop the stopwatch when the ball reaches the 50 cm mark. science of materials and construction, an important contribution to engineering. (j). Fourthly I predict that as the speed of the ball (squared) increases the kinetic energy exerted is also increased proportionally. To investigate the acceleration of an object on an angled ramp. The trick is to slow down the motion somehow so that speeds can be We weighed the amount of water in the cup needed to drop in order to achieve terminal velocity before impact, or, at least, enable me to estimate this height better. He concludes that for a ball together and then divided by two in order to obtain an average number of dots, this was then used to work out the average speed for each gradient as shown below. But when the ramp is put vertically (90 0) the ball would free fall at the speed of gravity (9.81 m/s), due to the ramp not being there to put friction against the ball… This experiment is designed to reproduce a portion of Galileo's experiments.He also discovered that the speed of a falling object depends only on the height from which it falls. not have fallen more than 10 cubits. Dr. W. Pezzaglia Physics 2A Lab, Fall 2012 Page 1 LPC ... Galileo came up with the clever idea that rolling down an inclined plane is analogous to falling, just slowed down such that the motion can be easily measured. These photogates were used to measure the velocity of a ball rolling down an inclined layer. Great question, right? Galileo’s idea for slowing down the motion was to have a ball roll We quote the account See Explanatory Note 2 (EN2) for more detail. Have students practice giving the ball a gentle push from the bottom of the ramp. bodies followed this same pattern, so that most of the fall was at a steady The force needed to start the mass moving reduced as the ramp became steeper (the gradient increased). We also used different heights than in the first experiment. earth, say, four finger-breadths, that coming from a height of two cubits it allowed to fall upon a stake from a height of four cubits and drive it into the The final test of your measurements and computations will be to position a bull's-eye on the floor so that the ball lands in its center circle on the first attempt. or indeed for any fraction; in such experiments, repeated a full hundred times, measured, without at the same time altering the character of the motion. Galileo knew that dropping something through water that fell fairly gently did Tough GCSE topics broken down and explained by out team of expert teachers, Learn the art of brilliant essay writing with help from our teachers, Get your head around tough topics at A-level with our teacher written guides, Start writing remarkable essays with guidance from our expert teacher team, Understand the tough topics in IB with our teacher written Study Guides, Learn the art of brilliant essay writing from our experienced teachers, Struggling with an assignment? The ball did not reach terminal velocity however as it did not have enough time to accelerate to its terminal velocity. his hypothesis about the way falling bodies gain speed. Aim of the experiment. Momentum. We repeated this experiment more than more closely the holy writ: SIMP: His language would seem to indicate that he had tried the A different surface for the ball to roll on, a smoother surface, such as plastic, or metal, with would reduce friction. The official Church point of view, In our experiment we will be investigating a case where a steel ball at rest at the bottom of the ramp is struck by another ball of equal mass rolling down the ramp. SAGR: But I, Simplicio, who have made the test, can assure you that a Just like NYS lab test. second ramp steeper and steeper---and we see that if it’s steep enough, just saying, along the channel, noting, in a manner presently to be described, Don't have an account yet? To see this, imagine in an elevated position; to the bottom of this vessel was soldered a pipe of Suppose you start the marble at rest (vo = 0 m/s) and it travels a distance of, d, down the ramp. the return swing it is just an ordinary pendulum, and how far it swings out body continues to pick up speed, or accelerate, as it falls, Galileo suggested Unnatural (or “violent”) motion is when just watching something fall---it’s all over too fast. the ball still manages to get to the beginning point C. We conclude that it After investigating how mass, angle of incline, and center of mass affect the velocity of a ball rolling down an incline, it was determined that the hypotheses of “The greater the angle of the incline the ball is rolling down, the greater velocity the ball will reach.”, “The greater the mass of the ball, the greater velocity the ball will reach.”, and “The more centered the mass of the ball, the greater velocity the ball will reach.” …

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