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Free Fall Centers. Will Paper Fall Like a Stone ?. What happened?. Will Paper Fall Like a Stone?. Dropping the sheet of paper to the floor by itself will make it move from side to side and descend slowly because of the air resistance.
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Will Paper Fall Like a Stone? • What happened?
Will Paper Fall Like a Stone? • Dropping the sheet of paper to the floor by itself will make it move from side to side and descend slowly because of the air resistance. • The book is heavy enough to overcome the air friction and it drops in that short distance as if there were no resistance. • Together, our intuition says that the paper should stay behind the book in falling to the floor, but they fall at the same rate because under the paper there is no air and thus no resistance. It is as if the paper fell in a vacuum.
The Falling Pennies • What happened?
The Falling Pennies • As both pennies were released at the same moment, the force of gravity started to work on the pennies at the same time. • The downward component of the forces working on each of the pennies is therefore the same, and thus also the acceleration they obtain, resulting in reaching the floor in exactly the same time. • This is why only one loud click (first click) is heard of the two pennies falling, regardless of the initial horizontal force imparted on one of them. • In our case the air resistance was disregarded, because of the relatively short distance of fall.
The Falling Washers • What happened?
The Falling Washers • The falling weights are all subjected to gravity. The force of gravity imparts an accelerated motion to each of the weights. • Because the force and mass of the weights are equal, the acceleration of each of the weights is the same. • The difference is that the further the weight falls, the greater the velocity (v = at) of the weight when it hits the pie pan. • When the weights are placed at regular intervals, the arrival is irregular, getting faster and faster, due to increased velocity (acceleration of gravity X time). • The weights in the second demonstration also have equal increasing velocity, but because of the increased distance between weights, they arrive at even intervals.
