A dynamic cart moving at 4 m/s is run into the back of and sticks to an identical cart. At what speed should the two carts move off
together?
2 m/s
4 m/s
8 m/s
It cannot be determined with knowing the actual mass of the carts.

step-by-step explanation:

y = | -2(-2) |     →     y = | 4 |     →     y = 4       ⇒   (-2, 4)

y = | -2(-1) |     →     y = | 2 |     →       y =   2       ⇒   (-1, 2)    

y = | -2(0) |     →     y = | 0 |     →       y = 0         ⇒   (0, 0)

y = | -2(1) |   c →     y = | -2 |     →     y =   2         ⇒   (1, 2)    

y = | -2(2) |     →     y = | - 4 |     →     y =   4         ⇒   (2, 4)  

5

10

15

20

25

30

35

40

45

50

55