Unformatted text preview: the object. This is an application of Newton’s second law to the gravitational attraction of Mars for the astronaut. 2 555 N or 3.7 m s 150 kg net Mars F W a g m m = = = = 20. We begin by using Newton’s second law to find the net force on the block. ( 29 ( 29 2 10 kg 3 m s 30 N net F ma = = = We then realize that the net force is just the vector sum of the applied force (the tension) and the frictional force. If we take the direction of the applied force as positive, the frictional force is negative and we have net applied friction F F F =Therefore, 30 N 50 N 80 N applied net friction F F F = + = + = In terms of vectors, we have applied F net friction F F...
View
Full Document
 Fall '02
 GregoryFrancis
 Force, Mass, net force, Fnet, gravitational attraction

Click to edit the document details