[" A particle which has zero rest mass and non-zero energy "],[" and momentum must travel with a speed "]

The particle which has zero mass but has energy is

A particle having almost zero mass and exactly zero charge is

Speed is always non-zero.

Can a particle possess. (i) Zero speed and non zero velocity,.

Statement I : A particle with zero velocity may have a non - zero acceleration. Statement II : A particle comes to rest at the instant of reversing its direction of motion.

Read each statement below carefully and state with reasons and examples, if it is true or false, A particle in one-dimensional motion (a) with zero speed at an instant may have non-zero acceleration at that instant (b) with zero speed may have non-zero velocity (c) with constant speed must have zero acceleration, (d) with positive value of acceleration must be speeding up.

Read each statement below carefully and state with reasons and examples, if it is true or false, A particle in one-dimensional motion: a) with zero speed at an instant may have non-zero acceleration at that instant, b)with zero speed may have non-zero velocity, c)with constant speed must have zero acceleration, d)with positive value of acceleration must be speed-ing up.