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
This older woman is exploring new avenues of enjoyment as she avoids stagnation in her later years
Earth Atmosphere
Earth’s Spheres
The Last Man on Earth
International space station
Water strider (Gerris remigis) on water surface, showing surface tension.