Recent content by ritik.dutta3

No, @adjacent, the question isn't incomplete. We have to fill in the blank. "the acceleration varies with x as ________ ". Sorry for not mentioning it clearly!

Homework Statement A particle moves along a straight line such that its displacement x changes with time t as x= sqrt( at+2bt + c) where a, b and c are constants, then the acceleration varies with x as Homework Equations The Attempt at a Solution I can't figure out how do i solve...

Got it! Thanks! :D

Homework Statement The two blocks in an Atwood machine have masses 2 kg and 3 kg. Find the work done by gravity during the fourth second after the system is released from rest. Homework Equations Work done by gravity= mgh The Attempt at a Solution Both the masses will have the...

No voko, i cannot.

voko, here is what i did: (a+b)2= a2+b2+2(a).(b). (a-b)2=a2+b2-2(a).(b). on equating them, the square terms get canceled and what remains is this: 4(a).(b)=0 (a).(b)=0 since in a dot product if the product is equal to 0, the angle between them should be 90 degrees. but why do we...

but why do we have to use dot product and not cross product?

If |vector a+vector b|= |vector a- vector b| show that vector a is perpendicular to vector b. A friend of mine suggested me to square both the sides of the equation. At the end, the result was vector a. vector b=0, from which it could be proved that the vectors are perpendicular. But...