Let's begin by determining the equilibrium position of a seesaw pivot. you and a friend play on a seesaw. your mass
90 kg, and your friend’s mass is 60 kg. the seesaw board is 3.0 m long and has negligible mass. where should the pivot be placed so that the seesaw will balance when you sit on the left end and your friend sits on the right end?

What is the scientific definition of energy that relates to work

Critical mass is the of material required to produce a chain reaction. a.) minimum amount b.) atomic mass c.) precise amount d.) maximum amount

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?