Скачать или смотреть 8th standard science Numerical Problem

8th standard science question answer Numerical Problem unit 2 force and pressure
How to find out Calculating Pressure, Force, and Fluid
#science
Unit 2 in 8th-grade science typically covers "Force and Pressure". Numerical problems in this unit usually involve calculating pressure given force and area, or calculating force given pressure and area. Another common type of problem involves pressure due to a fluid column, where you might calculate pressure based on density, height, and gravity.

1. Calculating Pressure:
If a force of 500 N is applied to an area of 2.5 m², what is the pressure?
Solution: P = F/A = 500 N / 2.5 m² = 200 N/m² or 200 Pa.
2. Calculating Force:
If the pressure is 1500 Pa and the area is 0.75 m², what is the force?
Solution: F = P * A = 1500 Pa * 0.75 m² = 1125 N.
3. Pressure in a Fluid:
What is the pressure at the bottom of a swimming pool that is 2 meters deep? (Assume the density of water is 1000 kg/m³).
Solution: P = d * h * g = 1000 kg/m³ * 2 m * 9.8 m/s² = 19600 N/m² or 19600 Pa.