A tractor of mass 5.0 × 10³kg is used to tow a car of mass 2.5 × 10³kg. The tractor moved with a speed of 3.0m/s just before the towing rope became taul, calculate the;speed of the tractor immediately the rope becomes taul, loss kinetic energy of the system just after the car has started moving,,impulse in the rope when jerbs it in the car into motion.

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?