Answer :
If the patient mass 130 kg and height is 187cm for hydrotherapy he has to immerge in pool of water, his mass in the pool would be 98 kg.
How to find mass?
The buoyant force is the force that pushes an object upwards in water. The buoyant force is equal to the weight of the water displaced by the object.
Calculate the volume of the patient.
Calculate the weight of the water displaced by the patient.
Subtract the weight of the water displaced by the patient from the patient's mass to get the patient's mass in the pool.
In this case, the patient's mass is 130 kg, and his volume is approximately 0.07 m³. The density of water is 1000 kg/m³, so the weight of the water displaced by the patient is 70 kg.
The buoyant force will counteract the force of gravity, so the patient's mass in the pool will be 130 kg - 70 kg = 98 kg.
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