Recent content by ridsyfootball

thanks for the help guys i understand now and iv got what i think is the correct answer.

Homework Statement A weight lifter (mass 75Kg) raises body's centre of mass by 0.4 in the process of lifting a barbell weight of 70kg to the height of 1.04m above the ground. Calculate the total work done in lifting the weight.The weight is raised in 0.2 seconds; hence calculate the power of...