physics chapter 6
a piece of putty moving w 1 unit of momentum strike and sticks ti a heavy bowling ball that is initially at rest. both move with a combines momentum of
1 unit
the speed of a 4 kg ball w a momentum of 12 kg m/s is
3 m/s
it is correct to say that impulse is equal to
a corresponding change in momentum
a heavy truck and a small car rolling down a hill at the same speed are forced to stop in the same amount of time. compared w the force that stops the car the force needed to stop the same truck is
greater
padded dashboards in cars are safer in an accident than a non padded ones because passengers hitting the dashboard encounter
lengthened time of contact
if you can't avoid being hit by a fast moving object you'll suffer a smaller contact force if you can extend that force over a
longer time
a freight train rolls along a track w considerable momentum. if it rolls at the same speed but has twice as much mass, its momentum us
twice