A floating ball normally weighs 7 N. The acceleration of gravity is 9.8 m/s^2. What is the size of the buoyant force that acts on it?
Answer in units of N.
To find the size of the buoyant force acting on the floating ball, we can use the concept of buoyancy. Buoyancy is the upward force exerted on an object submerged in a fluid, which in this case is the air.
The buoyant force is equal to the weight of the fluid displaced by the object, according to Archimedes' principle. In this case, the fluid is the air, and the object is the floating ball.
Since the ball is floating, its weight (7 N) is balanced by the buoyant force. Therefore, the buoyant force is equal to 7 N.
So, the size of the buoyant force that acts on the floating ball is 7 N.
The buoyant force acting on an object is equal to the weight of the fluid displaced by the object. In this case, the ball experiences an upward buoyant force that is equal in magnitude to its weight, in order to keep it afloat.
Therefore, the size of the buoyant force acting on the ball is also 7 N.