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Forces component question

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Reply 20

L'Evil Fish

Original post by krisshP

which dotted line? The one perpendicular to the one parallel to the inclined surface?

I understand now, but still.

Yeah that one :smile:

if you draw this line with longer dashes

It should form a right angled triangle between the dotted and dashed line :smile:

With theta between the vertical and dotted.

And (90-theta) call it phi, between the vertical and dashed.

Reply 21

krisshP

Original post by L'Evil Fish

Yeah that one :smile:

if you draw this line with longer dashes

It should form a right angled triangle between the dotted and dashed line :smile:

With theta between the vertical and dotted.

And (90-theta) call it phi, between the vertical and dashed.

I starting to be more confused. But I already get it. Using your hands helps so much. If you twist them a bit it helps a lot and is simple for me! :smile:

thanks

Reply 22

L'Evil Fish

Original post by krisshP

I starting to be more confused. But I already get it. Using your hands helps so much. If you twist them a bit it helps a lot and is simple for me! :smile:

thanks

Ahah okay

sorry! It was going to be a triangle where you'd have to find the length of the dotted perpendicular line and then the dashed line.

Reply 23

krisshP

Original post by L'Evil Fish

Ahah okay

sorry! It was going to be a triangle where you'd have to find the length of the dotted perpendicular line and then the dashed line.

How do you smart physicts recognise these angles so so fast??

Reply 24

L'Evil Fish

Original post by krisshP

How do you smart physicts recognise these angles so so fast??

If the component you want has the angle in between it and the force you know, then it's NCosTheta where N is magnitude of force you know.

If it's not it'd be NSinTheta

Reply 25

krisshP

Original post by L'Evil Fish

If the component you want has the angle in between it and the force you know, then it's NCosTheta where N is magnitude of force you know.

If it's not it'd be NSinTheta

thanks

Reply 26