Chapter 11: Force and Pressure

Q1. What is the difference between mass and weight?

Solution

Mass: Amount of matter, constant (kg)
Weight: Force due to gravity, varies (N), W = mg

Q2. A force of 10 N acts on an area of 2 cm². Find the pressure.

Solution

P = F/A = 10/(2 × 10⁻⁴) = 50000 Pa = 50 kPa