A simple "do it yourself" experiment, performed in class, showing that objects accelerate as they fall is
A) dropping an object from several meters high, and measuring its position at the end of each second.
B) dropping an object to the floor from various heights, and observing the sound of the object hitting the floor.
C) using a flash camera to photograph the position of a ball at several equally-spaced times as the ball falls.
D) throwing an object horizontally from some distance above the ground, and measuring the time for it to hit the ground as compared with an object that is simply dropped from the same distance above the ground.
E) dropping an object to the floor from various heights, and measuring the time of fall.
B
You might also like to view...
The diagram below shows three approximate locations of the sun along the western horizon. Which number indicates the location of the sun at sunset on the vernal equinox for an observer at a latitude of 48° S?
a. 1
b. 2
c. 3
d. The sun will set in the east for an observer in the southern hemisphere.
e. The sun will not set on vernal equinox at this latitude.
Cathode rays and ________ are both streams of electrons.
Fill in the blank(s) with the appropriate word(s).
The diagram shows a plot of the temperature of the sun as a function of distance above the bottom of the photosphere. At what distance above the bottom of the photosphere does the temperature of the sun change the most rapidly with distance?
a. 1,000 km
b. 2,300 km
c. 2,500 km to 4,000 km
d. 400 km
e. a and c
The luminosity class of a star tells an astronomer:
A) whether the star is close to us or far away B) whether or not the star is surrounded by planets C) whether the star is a supergiant, a giant, or a main-sequence star D) how long ago the star formed E) none of the above