forces - momentum

Question 1

all ______ objects have ________. But if an object is ___ _______ then it’s _________ is 0

Answer 1

moving, momentum. nit moving, momentum

Question 2

momentum equation

Answer 2

momentum (kg m/s) = mass (kg) x velocity (m/s)

Question 3

what is conservation of momentum?

Answer 3

in a closed system, the total momentum before an event is equal to the total momentum after an event

Question 4

conservation of momentum example of a van crashing into a car

Answer 4

van travelling towards stationary car. it is moving so has momentum (mass x velocity) in forward direction . stationary car has no momentum as not moving. now van collided with car. car + van move together with a lower velocity than initial velocity of van. total momentum of car and van together is the same as initial momentum of van by itself. total momentum before is the same as after collision. it has been conserved

Question 5

conservation of momentum example of a cannon ball and cannon

Answer 5

before cannon fires, both cannon ball and cannon are not moving so total momentum is zero. she fires, cannonball moving at very large velocity so cannon ball now has momentum in forward direction. at same time, cannon recoils (backwards), cannon has momentum in backward direction which equals forward momentum of cannon ball. this means total momentum after firing is zero. momentum before firing was zero and after firing is also zero so momentum has been conserved.