Recent content by steve357

Motion Mountain. it's available in pdf and is said to be the best available..

I just came across a question in MM that said what is the color of the line separating a black spot from a white background the answer was color is applied to objects not to backgrounds. i did not understand anything..anybody did?

Fine that's alright but where does the potential energy of the string go then?Since their's no form visible to me i can with much confidence say that your string case is also not possible.

I don't know..nothing about mechanical energy conserved or otherwise is mentioned in the question..But i strongly feel this case is not even possible See for a moment just consider this case- you connect a block with a spring,connect the other end of the spring with the ceiling.. now due to...

yeah right i also got till there but what when n is in decimal??

There are many numbers between 1/100 and 39/100 which don't have a denominator of 100. yeah but i was trying to first find that n for which i shall get the limiting values;i mean 0.01 and 0.39. And i did not understand what you said in the second part

Two blocks A and B are connected to each other by a string and spring (the part from pulley to block b is a spring sry i could not show!).the string passes over a frictionless pulley.Block A slides over the horizontal top surface of a stationary block C and the block B slides along the vertical...

See i don't know anything about forums..like where do we even get the section "homework help"..! anyways that's not the issue here. For the first question i tried to make the denominator 100 for which i got n in fraction now that if i put in numerator then in all probability it becomes a...

Another doubt- in a question i read that if a block be connected to a spring then it can have constant velocity even in the state of free fall..can it be? and if it so will not the potential energy(spring potential) change throughout the journey?

Yeah that doubt got cleared thanks

But how do we find work done when a force changes its direction

I have 2 doubts regarding work and KE first deltaKE=work done which = force * disp * cos theta..if theta lies between 90 and 180 then work done is negative so change in KE is -ve so even final KE can come negative..but we know that KE can never be negative..where am i wrong??Second- how do we...

Q 1:- Given a sequence kn=[(1+(-1)^n)+1]/5n+6.. find the no of terms of the sequence kn which will satisfy the condition kn lies between 1/100 and 39/100. Q 2:- Find the sum of all the irreducable fractions between 10 and 20 with a denominator of 3 Q 3:- Find all pairs of natural no s...