Recent content by timarli

Thanks a lot haruspex. x was wrong, well spotted. It should be 't'. what I am trying to do is derive a formula to show the affect of speed on the tripping. Assuming the object is a car and the obstacle is a concrete block; I would like to find out what's the speed above which the car...

Homework Statement An rectangular object(mass m) sliding on a horizontal plane (surface is frictionless), with a speed V, object height H. then hits a rectangular obstacle with height h. V is large enough to cause tripping Homework Equations what is the relation between linear...

I couldn't understand the first part. To me, Fc is a resultant force, it's not a force acting on the body so I always thought I can not write it as "m.g.cos0-Fc.sin0 = N". I don't know why because the same thing makes sense to me for the other axis ie. "Fc.cos0=Ff+m.g.sin0". :S Looks like I...

Thanks SammyS. Eq#2: if N=m.g.cos0 is not true then I'm more confused...But equation#5. I hope you are right. That's the main issue that confuses me; every source gives a different formula, some of them take the directions different, some of them find the signs of cos & sin different. I really...

So is there any loss in the mechanical energy? I can't think of a reason for loss :S To me it seems like both momentum and energy is conserved?

Hi, I am confused a little bit with the forces acting on a vehicle when it's negotiating a bend, at constant speed. Please click the link to see my sketch. On the plan view I see that it's moving with constant speed, along a circular route. That means there is unbalanced force...

Thanks a lot for the response D H. I will try to answer in the same order; OK, it's only Earth and the object and the observer. The observer looking from the top. The object is undergoing a uniform angular motion. The acceleration is a=v^2/R F = m*a And the only acceleration is the angular...

Thanks a lot utkarsh5. Like you said I was using different axis' where I was simplifying horizontally without realizing that I was introducing a new component. Thanks again :)

Hi, This is one of the things that confuses me. Assume an object on the surface of the Earth has a mass m and F=m*g is the force on it due to the gravity. But also the Earth is rotating and although the radius is extremely large compared to the size of the object but it must be affected...

Hi, This is not related with a specific homework question. I was studying this topic and have noticed that I didn't understand some bits.The car is negotiating a bend with a speed of V. The slope of the banket is θ The coefficient of friction is η Weight of the car if mg Radius of the bend is R...