320 N force is applied to a horizontal spring which stretches it by 7 cm cm to the left. What is the spring constant of this spring? 2. A 763 g mass is placed on top of a spring. The other end of the spring is attached to the floor. You also push down on the mass with a force of 2.1 N. The spring moves downward a total of 0.079 m from its equilibrium position. Find the spring constant of this spring. 3. A spring is hanging vertically and has a spring constant of 5730 N/m. An unknown mass is hung from the spring. If the mass causes the spring to stretch by 0.17 m, find the weight and mass of the object. 4. A cube rests on a table. The cube has a mass of 7 kg and each side of the cube is 0.08 m long. What is the pressure of the cube resting on the table?

AND

An object of mass 10 kg and a volume of 1500 cm3 is attached to one end of a spring. The other end of the spring is attached to the bottom of a boat that is in the water. The spring constant of the spring is 2000 N/m.

a) Will the object float, sink, or remain stationary in the water? b) If the object will float or sink, determine how far the spring will be compressed or stretched respectively. c) Repeat parts a) and b) if the mass of the object is doubled to 20 kg, but it still has a volume of 1500 cm3.