Buoyant force

1. Which of the following is correct

• Upthrust= Weight of the water displaced
• True wt - apparent wt
• More volume inside water , more upthrust
• All of these

2. A body of mass 10g floats on water. Upthrust on it Wil be

• Less than 10 gf
• More than 10 gf
• Equal to 10 gf
• None

3. Archimedes priciple is..

• Upthrust = true wt - apprent wt
• Upthrust = ρ v g
• Upthrust = wt of the liquid displaced by immersed part
• All

4. A body weighs 180 gf in air and 100 gf in water when fully immersed. Upthrust and volume will be:

• 80 gf , 100 cc
• 80 gf , 80 cc
• 100 gf , 180 cc
• None
• Cc= cubic centimetre

5. A stone tied to string is immersed in water. Tension in the string will..

• Increases
• Decreases
• Remains same
• None