monkeyMD Full Member 10+ Year Member Joined Oct 29, 2010 Messages 510 Reaction score 1 Feb 2, 2011 #1 Members don't see this ad. On a flat plane, doesn't the normal force equal weight of object, aka mg? Then why does example 2.13a in TBR physics say N=the object's mass in lbs?
Members don't see this ad. On a flat plane, doesn't the normal force equal weight of object, aka mg? Then why does example 2.13a in TBR physics say N=the object's mass in lbs?
R Rabolisk Full Member 10+ Year Member Joined Jun 19, 2010 Messages 847 Reaction score 7 Feb 3, 2011 #2 Pound is a unit of weight, not mass, technically. Upvote 0 Downvote
ilovemcat Membership Revoked Removed 10+ Year Member Joined Apr 16, 2010 Messages 660 Reaction score 3 Feb 3, 2011 #3 monkeyMD said: On a flat plane, doesn't the normal force equal weight of object, aka mg? Then why does example 2.13a in TBR physics say N=the object's mass in lbs? Click to expand... On an incline, the Normal Force is usually equal to mgcos(theta). (I say usually because sometimes you have to consider tension pulling on your object as an additional component to the normal force. This is rare though). lbs is just another expression of weight. Upvote 0 Downvote
monkeyMD said: On a flat plane, doesn't the normal force equal weight of object, aka mg? Then why does example 2.13a in TBR physics say N=the object's mass in lbs? Click to expand... On an incline, the Normal Force is usually equal to mgcos(theta). (I say usually because sometimes you have to consider tension pulling on your object as an additional component to the normal force. This is rare though). lbs is just another expression of weight.
Dvdrxop Full Member 10+ Year Member Joined Nov 3, 2010 Messages 17 Reaction score 0 Feb 7, 2011 #4 1 lb is equal to 4.448 N if that helps Upvote 0 Downvote