A 55 kg object is lifted with a force (fup) of 1000 N. What is the acceleration of the object?

What is the kinetic energy of a 10-kg bicycle moving at 10 m/s

Bone-strengthening physical activity done increases bone-mineral content and bone density in youth.

Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.