Two closed containers look the same, but one is packed with lead and the other with a few feathers. how could you determine which has more mass if you and the containers were orbiting in a weightless condition in outer space?

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

Two forces produce equal torques on a door about the door hinge. the first force is applied at the midpoint of the door; the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force has a greater magnitude?