According to Galileo, which of these is a "natural" or "unforced" motion?
A) A stone falling straight downward.
B) A book coming to rest as it slides along the floor.
C) Both of the above.
D) Neither of the above.
D
You might also like to view...
A 4.0 kg mass has a velocity of 10 m/s to the EAST. The 4.0 kg mass undergoes an acceleration of 4.0 
to the WEST for 3.0 sec. What is the velocity of the 4.0 kg mass at the end of the 3.0 sec interval?
A. 22 m/s to the WEST B. 2.0 m/s to the WEST C. 0.0 m/s D. 2.0 m/s to the EAST E. 22 m/s to the EAST
The biggest surprise from the New Horizons flyby of Pluto was learning that Pluto _________.
A. has an ice-rich composition B. is too small to be considered a planet C. shows clear evidence of recent or ongoing geological activity D. has a moon named Charon
When a meteoroid enters Earth's atmosphere, it is called a(n) ______________
a. meteor or "shooting star" b. asteroid c. star d. planet e. dwarf planet
Electrons are "spin one-half," photons are
a. also spin one-half. b. spin zero. c. spin one. d. none of the above.