Posted by Cheryl | Posted in Golf Balls | Posted on 10-11-2010
Tags: golf ball vacuum
Please help me with this, TNX!?
A ping-pong ball and a golf ball dropped in a vacuum chamber from the same height and at the same time. When they have fallen halfway, have the same: energy energy a.Potential c.Acceleration b.Kinetic d.Velocity One pound object 10 is suspended by a chain from an overhead support. A horizontal force of 5.8 pounds is applied to the object. The measure of angle to the horizontal rope is A.30 b.45 degrees degrees degrees degrees C.60 D.90
For the first question, the two balls have the same acceleration, which is gravity. Gravity is constant throughout and since they are both in a vacuum, which will cover the same distance in time each time interval. This does not mean they have the same potential energy because they have the same mass. To the second question, you must use the balance to solve. As there is no vertical line is the downward force (10 pounds) and a horizontal force (5.8 pounds), simply apply a force opposed to them. (Note: It is not needed to convert to kilograms, and we're finding the angle) So tanx = opposite / adjacent ^ as -1 (opposite / adjacent) = x (x is the angle) So ^ -1 (-5.8 / -10) = 60 degrees I hope this helped
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