Abody 'a' of mass 0.3 kg is dropped from a certain height. at the same time, another body of mass 0.1 kg is thrown up vertically from the ground with an initial velocity of 10ms-1. find the acceleration of the centre of mass of the system of 2 bodies. also describe motion of centre of mass.

What are the applications of electromagnetic waves

Boxing gloves are padded to lessen the force of a blow. (a) calculate the force exerted by a boxing glove on an opponent’s face, if the glove and face compress 7.50 cm during a blow in which the 7.00-kg arm and glove are brought to rest from an initial speed of 10.0 m/s. (b) calculate the force exerted by an identical blow in the gory old days when no gloves were used and the knuckles and face would compress only 2.00 cm. (c) discuss the magnitude of the force with glove on. does it seem high enough to cause damage even though it is lower than the force with no glove?

In science and physics what is the standard unit of measure for speed?