1. A 1 kg blob of clay moving at 8 m/s collides inelastically with a 3 kg wooden block that is initially at rest.
mob
Valobi
Mobot
Vook
Palace
P =
P. =
a. What is the initial momentum of the system?
P
biobil mio Volobi
P = mooi Voici
P. = Paiobi + Poloski
blocki
b. What must be the final momentum (p.) of the system? (hint: same as your
answer for part a)
c. Calculate the velocity of the blob and block immediately after the collision
Vi =P
mob
+ m plock

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?