Author Question: A pulley has two supporting strands. To lift a load 1 meter means you will have to pull a distance ... (Read 49 times)

magmichele12 · **on:** Jul 29, 2018

A pulley has two supporting strands. To lift a load 1 meter means you will have to pull a distance of

A) 1/2 m.
B) 1 m.
C) 2 m.
D) more than 2 m.

Question 2

NASA satellites stay up because

A) they are moving so fast that they are able to fall around Earth.
B) their rocket engines hold them above Earth's surface.
C) there is no air resistance in outer space and thus no downward force on an orbiting satellite.
D) they are away from Earth's gravity and thus do not get pulled down toward Earth.
E) centrifugal force pulls outward on them.