Duas esferas A e B de massa m e 2m respetivamente são lançadas verticalmente para cima. A esfera A é lançada a partir do solo com velocidade de valor 10 ms-1, e a esfera B de uma altura de 2,0m, com velocidade de valor 6ms-1. Despreze o efeito da resistência do ar, e considere o referencial unidimensional 0Y, com sentido positivo de cima para baixo. Utilizando as Leis da Cinemática, determine a razão entre a altura máxima atingida pela esfera B e a altura máxima atingida pela esfera A.

W= fd
where f is an applied force and d is the distance over which it is applied. when a parachuting skydiver is at constant velocity, he is experiencing "terminal velocity", the point at which his acceleration down is canceled out by air resistance. that means that the resisting force of the air is equal to his weight, but in the opposite direction. with this, we can solve for the work done by the force.
w = fd
w = (92.0)(9.81 m/s^2) (325)
w= 2.93 x 10^5 j
the value for work in this case is positive because it is pushing up on the skydiver, who has a downward force of gravity.
therefore the answer is 2.93 x 10^5 j

Same the answer is b