Definition
Report | Sreena asks : find the centre of mass of a uniform semi circular ring of radius R and mass M? |
Report | Anurag asks : If the diameter of the base of a closed right circular cylinder be equal to its height h,then its whole surface area is? (a) 2*pie*h square (b) 3/2*pie*h square (c) 4/3*pie*h square (d) pie*h square |
Report | Anurag asks : Two steel sheets each of length a1 and breadth a2 are used to prepare the surfaces of two right circular cylinders-one having volume v1 and height a2 and other having volume v2 and height a1.Then, (a) v1=v2 (b) a1v1=a2v2 (c) a2v1=a1v2 (d) v1/a1=v2/a2 |
Report | Anurag asks : If h,S and V denote respectively the height,curved surface area and volume of a right circular cone,then 3*pie*V*h^3-S^2*h^2+9V^2 is equal to:- (a) 8 (b) 0 (c) 4*pie (d) 32*pie^2 |
Report | Saish asks : Is it true that linear motion also has angular momentum? Can linear momentum be converted to angular? e.g. If there is a disk hinged at centre. A bullet can be fired at it such that line of motion of the bullet is parallel to plane of the disk. the bullet is fired so that it hits the disk, somewhere above the centre. After collision, the bullet sticks to disk and both undergo circular motion, having nonzero angular momentum. Since no external torque is exerted, angular momentum before and after is conserved. Hence, angular momentum before is not zero, and linear motion has angular momentum. I |
Feedback
Help
