Terminal Velocity + Crumple Zones

Question 1

process

Answer 1

object accelerates, reactionary force of drag builds up, both increase, acceleration slows to a steady velocity, weight = air resistance

Question 2

occurs when a force acts on a moving object

Answer 2

change in momentum

Question 3

change in momentum equation

Answer 3

force = change in momentum / time

Question 4

role of crumple zones

Answer 4

increase the impact time to decrease the change in momentum by absorbing impact energy in a collision

Question 5

seat belts

Answer 5

decreases short sharp impact, prevents forward movement, spreads force across chest, decreases decelerating force

Question 6

child car seats

Answer 6

faces backwards, not thrown backwards, spreads force

Question 7

impulse =

Answer 7

change in momentum, must increase time when decreasing force to keep constant

Question 8

impulse equation

Answer 8

force x change in time