Author Question: A fan attached to an ice sailcraft stalled on a windless day blows air into the sail that bounces ... (Read 43 times)

LCritchfi · **on:** Jul 29, 2018

A fan attached to an ice sailcraft stalled on a windless day blows air into the sail that bounces backward upon impact. The boat

A) moves in the direction of the wind impact force.
B) does not move by this wind impact.
C) moves, but in the opposite direction of the wind impact force.

Question 2

Recoil is noticeable if we throw a heavy ball while standing on roller skates. If instead we go through the motions of throwing the ball but hold onto it, our net recoil will be

A) zero.
B) the same as before.
C) small, but noticeable.