Recent content by neo143

What about friction due to atmosphere??

Why the Earth keeps on spinning?

d is given D is give wavelenghts are given what else you want to solve this problem :-)

u is the velocity with which shot is fired...you can say initial velocity in Newtons equation... The third part is crucial...You have to be careful...since initial velocity was in horizontal direction...and gravity acts vertically...so initial velocity will be unaffected...vertical velocity you...

thanks for making the point ...actaully I am sorry I didn't mention forces are not constant...it is a gravitational force ...so inversely proportional to r^2...what is your opinion now?...suupose it starts retarding the object at t= 0 ...and at that time gravitational force is much weaker than...

okay ...I think he will not copy the equation...but will try to understand how to write equations...

Yes that is what i wanted to know...suppose one force is action along the line ( either accelerating or retarding the object) and the other one is perpendicular ...will try to make the object rotate around it...but that force should be equal to the cntripital force...will object go on spiral...

I haven't given complete solution...and I am sure he would have done the same

In all cases velocities will be the same suppose when it is fired straight down final velocity will be v= root ( u^2 + 2gh) In the case when it is fired up...when it will be back to the same point the velocity will be the same as in downward case ( energy conservation) so it will aslo take...

First part Limiting force will be static friction * N = static friction * mg that you can easliy calculate Second part Net force in the direction of motion will be 250 -kinetic friction* (N1 + N2) = 250 -0.10(m1g + m2g) = (m1 + m2) a if you know m 1 and m2 ...you can easily calculate...

Ans: Y = Sin2t - Cos2t + c

There will be no normal force. Now balance the forces in horizontal and vertical direction. Suppose Tension is T1 in first wire and T2 in second wire T1 cos(50) = T2 cos(25) T1 sin(50) + T2 sin(25) = Mg Now try to solve. enjoy

Acceleration or retardation depend on the angle( you can make component of force along the motion and perpendicular to the motion )...I wanted to know the trajectory of the moving object ...will it start circular motion around the force?

First you have to specify if you are considring only Earth and masses in your system ( no other planets and starts). Then it depneds on the mass of objetcs you are thinking...If masses are small like 1 KG or 10 KG or 100 KG ...then the time will be nearly the same...since the value of G is very...

could anyone tell me What will happen if a force is acting on moving object at angle theta ( assume theata is niether 90 nor 180)?