Qualification > Sciences
Physics help!
cooldude:
--- Quote from: ~Ahana~ on August 26, 2010, 02:59:13 pm ---yeah I figured that....didn't really notice what they were asking for. :-[
Ah...one more question
June 2010 paper 4 variant 1, Q3 b) How can they say acceleration is constant ? :S Is it because a=g ? :-\
--- End quote ---
yeah in a way, well the component of the weight that acts down is mgsinx, let x be the angle between the inclined plane and the ground, so mgsinx=ma
so a=gsinx, x is the same for both and g is a constant therefore the acceleration is constant and therefore it cant be shm as a varies with the displacement
nid404:
yup component of g I meant...ohk just confirming...thanks :)
nid404:
With reference to capacitors, can someone explain what 'smoothing' is?
M-H:
Yeah capacitors smoothen AC. As in think of it, the capacitor is charged during the positive cycle, while it discharges during the negative cycle. the discharging and charging takes up time...that way, the discharging and charging do not happen at equal intervals..eventually, a graph that would be normally with distinct waves, with a capacitor, you can see it becoming for even.
Sorry, this is a rough explanation. hope it helped.
nid404:
Uhm...Can you get me a graph please ;D Visualizing this is beyond the capacity of my cat brain :P Physics doesn't go well with me ::)
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