What impulse occurs when an average force of 20-N is applied by a dad to a new bike riding child for 3.5 s. b) What change in momentum does the new bike rider undergo? c) If the combined mass of the bike and the child is 32 kg and the child was initially at rest, calculate the final speed.

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?