I need help with this question below ASAP! What is the acceleration when an unbalanced force of 55 N is exerted on a 40 kg person?

Thank you for your help :)

In physics the desire of an object to keep doing what it is doing is termed?

What happens when the vapor pressure of a liquid is equal to the external pressure?

2) a cubical block of stone is lowered at a steady rate into the ocean by a crane, always keeping the top and bottom faces horizontal. which one of the following graphs best describes the buoyant force b on this block as a function of time t if the block just enters the water at time t = 0 s?