Though redundantly described as a resting phase, interphase does not really involve rest. Comment.

In a circular motion of a particle the tangential acceleration of the particle is given by a_(1)= 2m//s^(2) . The radius of the circle described is 4 m. The particle is initially at rest. Time after which total acceleration of the particle makes 45^(@) with radial acceleration is :

(A): When a shell at rest explodes, the centre of mass fragments Continues at rest (R) : In explosion the linear momentum of the system does not remains conserved.

(A) : When an electron and proton are released from rest, though they are moving their center of mass remains at rest. (R ) : Proton is heavier than electron.

The body of sponges does not possess tissue level of organisation, though it is made up of thousands of cells. Comment on it.

When a car of 3mass 1000 kg is moving with a velocity of 20ms^(-1) on a rough horizontal road, its engine is switched off. How far does the car move before it comes to rest if the coefficient of kinetic friction between the road and tyres of the car is 0.75 ?