Question

answer please?

Answer 1

A construction truck collides with the back of a subcompact car. Which vehicle has the larger change in momentum during the collision?
(Points : 1)
The small car has a larger change in its momentum.

The huge truck has a larger change in its momentum.

They have the same change in momentum.

Neither one changes its momentum.

Answer 2

things with larger mass have more resistance to change in momentum during impacts -- they dont change alot.

Answer 3

so the small car correct?

Answer 4

what if it was velocity ?

Answer 5

thats what Im led to believe yes. think of it like a golf club and a golf ball; when the two objects meet, which one changes velocity the most?

Answer 6

momentum is equal to the product of mass and speed.

spose we have a truck as 1000 mass and a car of 10 mass; it doesnt tell us that they car is moving, just that the truck hits it in the rear.

the truck will slow down a little bit, but the car will speed up alot to equal out the equation

Answer 7

the golf club ?

Answer 8

lets say the truck is going a speed of 50

1000(50) + 10(0) = (1000+10)(new velocity)

50000 = 1010 (new velocity)

50000/1010 = new velocity = 49.5

so the trucks momentum is 1000(49.5) and the cars momentum is 10(49.5)

the trucks momentum barely registered a change, whereas the car went from 0 to 495; thats a pretty big change in momentum

Answer 9

a golf club has a bigger mass than a golf ball; when the 2 connect, the golf ball goes speeding away and the club tends to barely slowdown in that example of mine

Answer 10

so the small car would have a larger change in velocity

Answer 11

you should post in the physics section,
but see
http://scienceworld.wolfram.com/physics/ConservationofMomentum.html

momentum is conserved,

Answer 12

momentum of a system is conserved; but what about the individual parts within the system?

Answer 13

Which vehicle has the larger change in momentum during the collision?

if one loses p, the other gains p

Answer 14

the car should have a larger change in velocity from the collision if im seeing this correctly :)

Answer 15

well thanks for helping me understand this :D

Answer 16

yes, p= mv and m is constant. so v must change.
the truck's v will go down, but the car's v will go up more, so that
M dv = m dv