A10 kg ball strikes a wall with a velocity of 3 m/s to the left. the ball bounces off with a velocity of 3 m/s to the right. if the ball is in contact with the wall for 0.22 s. what is the constant force (in newtons) exerted on the ball by the wall during the impact? report your answer as a positive number.

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?