Valerie and jake are performing the 1-d collisions experiment. they measure the mass of glider a to be 255 g and its length to be 17.3 cm. the same properties of glider b are 252 g and 17.2 cm. val pushes glider a through photogate #1, and jake reads the transit time from the computer display as 0.49 seconds. what is the speed of glider a, in m/s, as it passed through the photogate? jake pushes glider b through photogate #2 and calculates its speed to be 0.45 m/s. what is the momentum of glider b in kg m/s? val and jake run one of the four scenarios described in the procedure section. they add an additional 50.0 g of mass to glider b and start the experiment with glider b initially at rest. they measure the time for glider a to pass through photogate #1 to be 0.258 s. the collision occurs and glider a rebounds, going backwards through photogate #1 with a transit time of 2.883 s, while glider b passes forward through photogate #2 with a transit time of 0.282 s. calculate the total momentum of gliders a and b after the collision in kg m/s. in the trial run in pl-3, what is the total kinetic energy, in joules, of gliders a and b before the collision?