Object

Weight in Air

Apparent weight in water

Buoyant force

Volume of displaced water

Weight1

0.1 N

0.24 N

0.23N

0.1 ml

Weight2

0.2N

0.30N

0.28N

0.2ml

Weight4

0.8N

0.6N

0.2N

10ml

Weight5

1N

0.8N

0.2N

20ml

Weight6

2N

1.75N

0.25N

30ml

Weight7

2N

1.75N

0.25N

30ml

Weight8

5N

4.20N

0.8N

70ml

Weight9

8.5N

6N

2.5N

350ml

1. Observing; What force is responsible for the difference between the weight of each object in the air and its apparent weight in water?  Buoyant force
2. How is buoyant force related to the weight of water displaced? Buoyant force is equal to the weight of the displaced water.
3. Define buoyant force and describe two ways you can measure it or calculate it. the upward force exerted by any fluid upon a body placed in it. Weight in air decrease by weight in the water. Buoyant is equal to weight of fluid that object displace.
4. Explain what causes an object to sink or to float, using the terms buoyancy, weight, force, density and gravity. Gravity pulls object with greater density downward. Objects float is that at any depth in a fluid there is an upward force due to the effect of gravity on the fluid. Downward force, due to its weight, is greater than the upward force of the water at that depth.