Velma, the space woman, is orbiting above Earth's surface in a low-altitude orbit. Does she actually have weight, or is she actually weightless, and why?
A) She actually has weight, because Earth actually is pulling on her with nearly the normal pull of gravity.
B) She is weightless because she is away from the pull of Earth's gravity.
C) She is weightless because she is falling freely around the earth.
D) She is weightless because she is in a vacuum.
E) She actually has weight, because her weight remains the same no matter where she goes in the universe.
Question 2
A sled having a certain initial speed on a horizontal surface comes to rest after traveling 10 m. If the coefficient of kinetic friction between the sled and the surface is 0.20, what was the initial speed of the sled?
A) 9.8 m/s
B) 6.3 m/s
C) 3.6 m/s
D) 7.2 m/s
E) 8.9 m/s
The tenuous atmosphere of Mars, visible on the horizon in this low-orbit photo
lower surface of Arabidopsis thaliana leaf, showing a trichome
Space Station
Space-Beach Wallpaper
The Venusian Surface
Precession: Earth’s axis rotates, or “wobbles”