A railroad flatcar of mass 3,000 kilograms rolls to the right at 10 meters per second and collides with a flatcar of mass 2,000 kilograms that is rolling to the left at 5 meters per
second. The flatcars couple together. Their speed after the collision is

Astone is dropped with no initial velocity from the top of a cliff and hits the ground a time of 3.9 s later. what is the height of the cliff, in units of meters? you may assume that air resistance is negligible. give the answer as a positive number question 15 a figure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 200 o 20.9 12000 o 3.33

From 0 to 5 seconds john pushed a box 5 meters. from 5 to 10 seconds, paul pushed the same box another 5 meters. who did more work? a. john b. paul c. john and paul did the same amount of work.

How to calculate voltage drop in a series circuit