Q)
(chatquestion)...Lower surface of a plank is rough and lying at rest on a rough
horizontal surface. Upper surface of the plank is smooth and has a
smooth hemisphere placed over it through a light string as shown in
the figure. After the string is burnt, trajectory of C.M. of the sphere
40.
is
(A) a circle
(C) a straight line
(B) a ellipse
(D) a parabola
Plank
A system consists three paticles cach
...
