A body falling vertically downwards under gravity breaks in two parts of unequal masses.

(a) Each piece regenerates into a new Planaria. (b) Its filaments break into smaller pieces or fragments and each fragment gives rise to a new filament. (c) It releases spores which germinate into...

(d) : The centre of mass of bodies B and C taken together does not shift as no external force is applied horizontally.

(c) is same for both cars Explanation:  During slipping, the force of friction on a car  = µMg (where M is the mass of the car and µ is the coefficient of...

(c) in opposite directions with equal speeds  Explanation:  Let the velocities of two parts be v and v' and mass of each part = m. Momentum before the break = 2m*0 =...

(c) the two spheres reach the bottom together Explanation:  When the solid sphere rolls without slipping, its linear acceleration is given as, a =(5/7)g.sinθ {where θ is the angl of inclination with the horizontal plane.} Clearly the...

(c) is same for both cars Explanation:  During slipping, the force of friction on a car  = µMg (where M is the mass of the car and µ is the coefficient of kinetic friction.)...

(c) does not shift horizontally Explanation:  Since the body breaks due to internal forces, the center of mass of all parts taken together will remain the same and will not shift horizontally.

(a) the total momentum must be conserved (d) the total kinetic energy must change.  Explanation:  When the block moving in air breaks into two parts due to internal forces, the speeds of the...

(c) the two spheres reach the bottom together Explanation:  When the solid sphere rolls without slipping, its linear acceleration is given as, a =(5/7)g.sinθ {where θ is the angl of inclination with the horizontal plane.}...

Water flows downwards on any slope or on mountains due to the gravitational force acting upon it.