Lv 2592 points

Ajay

cool and logical

• My doctor suspects a meniscus tear?

I hurt my knee by doing squats,pain persisted for a long time (3 months) when I went to my doctor, he saw my x rays and said everything is normal but suspected a meniscus tear he asked me to take glucosamine sulfate for a month. Can I expect this treatment to be effective?

What are the other do's and dont's?

I am 18 years old and I don't see any swelling, but inflammation is there and motion is not restricted but at times little painful while stretching my knee in air,but able to do it. Will ice or heat work? Any exercises or diet?

• is induction stove safe?

any precautions to be taken?

which is safer microwave oven or induction stove?

in this video

http://www.physicsgalaxy.com/lectures/1/44/234/Sol... only the question)

the method illustrated is integration but i thought of an alternate method,

moment of inertia of half disc with radius r2 is 1/2mr2^2 and that of half disc with radius r1 is 1/2mr1^2.so the moment of intertia of system must be equal to difference of these moment of inertia since half disc with radius r2 is cutoff from radius r1,so shouldn't moment of inertia be subtracted too?

please tell the quickest method to do this.

• some good youtube channels for mathematics iit jee?

the language must be english or atleast english subtitles must be present.

• where does negative or positive charge in a compound reside?

take the case of ch3-,where does the extra electron lie?in pure orbital or hybridized orbital?and also please expalin why is it so and why is this case different from that of ch3+.

• Can conservation of momentum be applied here?

Take the case of Atwood machine, Where the masses of blocks are m and m,now,another ball of mass m strikes one of the blocks with a speed v and sticks to it.

Considering our system as blocks+ball+string connecting the blocks(no pulley),can we apply conservation of momentum?

Please explain why?our system is blocks+ball+string and no pulley.

Assume no gravity acts anywhere.

• can conservation of momentum be applied here?

Take the case of Atwood machine, Where the masses of blocks are m and m,now,another ball of mass m strikes one of the blocks with a speed v and sticks to it.

Considering our system as blocks+ball+string connecting the blocks(no pulley),can we apply conservation of momentum?

Please explain why?our system is blocks+ball+string and no pulley.

Assume no gravity acts anywhere.

take the case of atwood machine where masses of blocks are m and 2m.

the acceleration of individual masses are g/3.now the acceleration of center of mass of masses and string system is (m*g/3-2m*g/3)/3m = g/9.

there is only one force acting on the masses and string system-gravity.the net gravitational force is 3mg and therefore the acceleration of center of mass must be 3mg/3m=g.

acceleration of center of masses derived are not matching why?

• please solve this differential question dy/dx=sin(x+y)+cos(x+y)?

A block of mass m begins sliding down a smooth fixed wedge of height h,a rough plank of mass M is placed at the base of wedge (coefficient of friction is p),due to the friction between the block and plank,the block slows down and start moving together.what is the work done by friction in this case?

shouldn't it be change in kinetic energy of sliding block(1/2(m)v^2-1/2mu^2)?

v-mu/(M+m)

u-sqrt(2gh)

• an important conceptual question from newton's laws of motion?

see this video lecture

http://www.physicsgalaxy.com/lectures/1/8/130/Solv...

we get a1 and a2 from newton's laws of motion but these results don't match with the constrained equation obtained(see the photo attached).

please explain why?if the constrained equation is wrong,explain the correct constrained equation and why the constrained equation attached is wrong.

• when a block is placed on a floor normal force is equal to weight of block,why?

why shouldn't it be lesser or greater than weight of block?

• a block of weight w,is placed on a floor when a force greater than w is applied the block moves up,why doesn't normal force adjust itself?

a block of weight w,is placed on a floor when a force greater than w is applied the block moves up,why doesn't normal force adjust itself to balance the external force?

iam very much frustrated about these ads,when i am viewing a web page it suddenly directs into some other web page which has some advertisements in it,i even tried installing adblock plus but still couldn't block them.how can i stop this?iam using google chrome.