56)
56) consistent with the social facilitation effect, michaels and his colleagues (1982) found
that when good pool players were observed, they did
when they did not know
they were being observed.
a) much worse than
b) the same as
c) better than
d) slightly worse than

If there was no gravity then their would be no downword force on the football to have it return the the grownd, and if there was no friction (mainly air friction) then there would be no opposing force the stop the ball from moving through the air allowing the ball to travle ∞.

Answavelength; amplitude;

The force is push or pull