An iron ball weighing 10 pounds rests on two smooth plane-surfaced boards that are inclined at respectively 30 and 60 to the horizontal. to the nearest whole number, what is the pressure on the board from f1?

a force vector is projected in the directions perpendicular to the planes .in the question given the two boards are the planes.   the force vector will   be projected in the directions perpendicular to the two boards.

the two   balls   pushes on the board inclined at angles 30 degrees with a force of 10   cos30 =10()=

on the board inclined at 60 degrees it will be inclined   with a force of 10 cos 60 = 10(pounds.

1. 22

2. 1

3. 7

4. 18

step-by-step explanation

e2020 got it right

eve and marks ratios are equivalent

step-by-step explanation: