frictional forces and moments

Question 1

what is frictional force

Answer 1

force that acts in opposite direction to movement

Question 2

frictional force tries to ______ ______ moving objects

Answer 2

slow down

Question 3

3 frictional forces

Answer 3

friction (2 surfaces rubbing together)
air resistance
water resistance

Question 4

air resistance when sky diving process

Answer 4

skydiver jumps, gains speed as weight pulls down
increasing air resistance but still going fast
parachute-slowed down, increasing air resistance
eventually air resistance + weight of skydiver is equal and skydiver falls at steady speed