Physics 2022 JAMB Past Questions - Question 32: Calculate the upthrust on an object of volume 50cm³ which is immersed in a liquid of density 10³kgm-³. [g = 10ms-²]

Correct Answer

C

Explanation

To calculate the upthrust on an object immersed in a liquid, you can use the formula:

Upthrust = Volume of liquid displaced × Density of liquid × Acceleration due to gravity

Given:
Volume of the object = 50 cm³ = 50 × 10^-6 m³ (since 1 cm³ = 10^-6 m³)
Density of the liquid = 10³ kg/m³
Acceleration due to gravity = 9.81 m/s²

Upthrust = 50 × 10^-6 m³ × 10³ kg/m³ × 9.81 m/s²
Upthrust = 0.05 × 10³ × 9.81 N
Upthrust = 490.5 N

So, the upthrust on the object is 490.5 Newtons.