changes in momentum

what causes a change in momentum?

a force acting on an object

what is the equation for force in terms of momentum?

force = change in momentum ÷ time

how does force relate to change in momentum?

a larger force causes a faster change in momentum

why are car safety features designed to slow down crashes?

increasing the time taken to stop reduces the force, lowering the risk of injury

how do crumple zones help in a crash?

they absorb impact by increasing the time taken for the car to stop

how do seat belts reduce injury?

they stretch slightly to increase stopping time, reducing force on the body

how do airbags protect passengers?

they inflate and compress to slow down impact more gradually

how do bike helmets reduce head injuries?

they contain a foam layer that increases stopping time, reducing impact on the brain

why are crash mats and soft playground surfaces safer?

they are made of soft, compressible materials that increase stopping time, reducing force