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...
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...
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...
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...