skelly the child skater is propelled by rocket power. skelly and the rocket together have a mass of 25 kg. when the thrusting force is 100 N and friction is 20 N, a) what will be skellys acceleration? b) how far will he go in 5 s if he starts from rest?

Why is there friction between objects

The earth is constantly spinning on its axis, like you might spin a basketball on your finger. it is this spinning of the earth that causes

Two forces produce equal torques on a door about the door hinge. the first force is applied at the midpoint of the door; the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force has a greater magnitude?