Two particles with the same mass m=1 g are moving in space (where there is no gravity) . The magnitude of their speeds are the same and equal to u=10 m/s. The directions of their motion makes angle alpha equals 60 to the power of o with each other. a) Find the angle between the velocity of the center of the mass of the two particles and the velocity of one of the two particles?

b) Suppose the two particles collide and stick together. Find the magnitude of the velocity with which the two particles move after they are stick together.

c) How much energy Q=? is lost in the collision?

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?