A box with a volume (V=0.05 m³) lies at the bottom of a lake whose water has a density of (1*1O³ kg/m³). How much force is required to lift the box, if the .(mass of the box is (1000 kg 9315.9 N O 9391.5 N O 9319.5 N 9313.9 N O

A string holds a 100-kg Iron sphere 2 meters below the surface of the Ocean. If the volume of water displaced by the sphere is 0.05 m3, what is the tension in the string? The density of saltwater is 1025 kg/m3. (Hint: Make a force diagram of the string and sphere)

A large rectangular cube made of wood has the follow dimentions: a height, h = 2m, and an area od A = 0.25m^2. The wood that the cube is made of has a density of 800kg/m^3. The cube is then place vertically in water where it floats to rest. The density of the water is 1000kg/m^3. Then the cube is pushed down slightly (by a distance y) and released. The resulting motion is simple harmonic motion.    A) Determine the mass of the cube. B) Determine the depth,d, that the cube will float. C) If the cube is pushed further down under water by a distance, y, write an expression for the net force on the block in terms of: y,A,g,p. Where g=9.8m/s^2 D)Use the expression for the net forcee found in part C), and apply newton's second law (Fnet = ma) to the situation of the cube that is being pushed down slightly to derive an equation for the vertical accerlation (ay) (hint: dont forget to pick a positive direction)  Compare your results from part D) to the equation for simple harmonic motion using…

A 65 kg  rock is 120 m deep in saltwater. Density of saltwater is 1030 kg/ m3. The pressure on the rock due to saltwater is calculated to be? choose one correct answer with the correct unit of measure. [ use g =9.8m/s2 ]   A. 1211280 Pascal (N/m2)   B. 1211280 kg /m3   C. 76440 Pascal   D. 76440 N