Two boxes, m2 = 10 kg and m1 =15 kg, are attached to each other by a lightweight string and are pulled by another string attached to m1 . If the string pulling the box in the front has a force
of 500 N. what is the acceleration of m1 assuming the strings are kept taut? Neglect resistance
forces.
50 m/s/s
33.3 m/s/s
20 m/s/s
10 m/s/s

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?