a block is on a surface with ms=0.276. it takes 1.11 N to break it free from static friction. what is the mass of the block

How do you tell if someone actually cares about you? and just say they do?

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.

Consider a system with two masses that are moving away from each other. why will the kinetic energy differ if the frame of reference is a stationary observer or one of the masses?