The pressure at the surface of the ocean is one atmosphere. Assuming the density of ocean water is the same as pure water, how deep (in meters) does a diver need to go for the pressure to increase to two atmospheres? Use 4 significant figures in your answer.

Answer(b) 60 miles per hour;

Gravity, from the center of mass of the box, extending downward normal force, from the floor under the box, extending upward, equal to gravity push force, acting at a point on the box, extending in the direction of motion friction, acting at any point on the box directly opposite the push, extending directly opposite to the motion