Verification of Newtons Second Law
المؤلف:
GEORGE A. HOADLEY
المصدر:
ESSENTIALS OF PHYSICS
الجزء والصفحة:
p-50
2025-11-01
58
When a body is dropped, it falls in a vertical line with a uniformly increasing velocity due to the constant force of gravity. If instead of being dropped it is struck a blow, it moves in a curved path, the resultant of the uniform motion due to the blow and the accelerated motion due to gravity. According to Newton's Second Law, the time of falling should be the same in both cases if the blow is given horizontally.
Demonstration. -A simple form of apparatus for the demonstration of this law is shown in Fig. 1.
A support carries near the top a shelf with a hole in it. A thin wooden strip, fixed at the upper end, comes vertically down above the hole in the shelf. Place a small ball or marble on each side of the strip, so that the one over the hole is suspended by pressure between the wooden strip and a cleat on the shelf. Let the hammer fall upon the strip, and one ball will be thrown out horizontally and the other dropped vertically.
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