GCSE Secondary Maths Age 13-17 - Ratio, Proportion & Rates of Change: Speed, Density & Pressure - Explained

The video tutorial explains a physics problem involving pressure calculation. Initially, a force of 70 newtons is applied over an area of 20 cm². The force and area are both increased by 10 units, and the new pressure is calculated. The tutorial evaluates Helen's claim that the pressure decreases by less than 20%. By calculating the initial and new pressures, the tutorial demonstrates that the pressure decreases by more than 20%, proving Helen incorrect. The video also outlines the marks distribution for solving the problem.

What is the formula for calculating pressure?

Evaluate responses using AI:

OFF

Calculate the original pressure when the force is 70 newtons and the area is 20 centimeters squared.

Evaluate responses using AI:

OFF

What is the new pressure after increasing the force by 10 newtons and the area by 10 centimeters squared?

Evaluate responses using AI:

OFF

How much did the pressure decrease after the changes were made?

Evaluate responses using AI:

OFF

Explain why Helen's statement about the pressure decrease being less than 20% is incorrect.

Evaluate responses using AI:

OFF