an object with a volume of one cu ft , weighing 150 lbs. is embedded in the sediment at a depth of 99 fy. in the ocean harbor. the object is best lifted to the surface by

To lift an object from the ocean harbor, taking into account its volume, weight, and depth, you would typically need to use buoyancy and a lifting mechanism. Here's how you can calculate the buoyant force and select the best lifting method:

1. Calculate the buoyant force:
- Determine the density of seawater, which is typically around 64 lbs/cu ft.
- Multiply the volume of the object (1 cu ft) by the density of seawater to get the weight of the displaced water: 1 cu ft * 64 lbs/cu ft = 64 lbs.
- The buoyant force acting on the object is equal to the weight of the displaced water, which in this case is 64 lbs.

2. Determine the net force required to lift the object:
- Subtract the weight of the object from the buoyant force. In this case, the object weighs 150 lbs, so the net force needed is 64 lbs (buoyant force) - 150 lbs (object weight) = -86 lbs.

3. Select a lifting method:
- If the net force required is negative (-86 lbs), it means the object will naturally float to the surface. In this case, you can simply release the object, and it will rise on its own.
- If the net force required is positive, you will need to apply an external force to lift the object. This could be done using a crane, winch, or similar lifting equipment capable of exerting a force greater than the net force needed.

Remember to consider any additional factors, such as water currents or potential obstructions, when planning the object's retrieval. It's also essential to follow safety guidelines and seek professional assistance if needed.