Pressure in solidsIB MYP Physics: Flashcards
What these 12 flashcards ask
- Write the equation for pressure.
- What is the unit of pressure?
- What does the area in p = F / A mean?
- How do you find the force if you know the pressure and area?
- How do you convert 5 cm² to m²?
- A 900 N crate rests on 1.5 m². What is the pressure?
- What happens to pressure if the area gets smaller (same force)?
- Why can a sharp knife cut easily?
- Why do skis stop a skier sinking into snow?
- Why do tractors have wide tyres?
- Why do nails have a pointed end?
- Why do caterpillar tracks help a heavy digger?
Exam questions on Pressure in solids
- A warehouse worker in Rotterdam rests a wooden crate that weighs 900 N on a concrete floor. The largest face of the crate has an area of 1.5 m² and its smallest face has an area of 0.50 m².Calculate the pressure when the crate rests on its smallest face. Explain why this pressure is different from the pressure on its largest face.2 marks
- A skier in the Swiss Alps weighs 700 N. Each ski has a contact area of 0.20 m². Without skis, her two boots have a total contact area of 0.04 m². The snow is deep and soft.Calculate the pressure the skier exerts on the snow when she stands on both skis.2 marks
- Students investigate how the area of contact affects the pressure on soft sand. A brick of weight 24 N is placed on a tray of sand, resting on a different face each time. The three faces have areas of 0.020 m², 0.010 m² and 0.005 m². The depth of the dent in the sand was 3 mm, 6 mm and 12 mm respectively.State a testable hypothesis for this investigation and give a scientific reason for it. State the dependent variable.3 marks
Written by the Exaim team, led by Shaun Daswani (Head of Upper Secondary, Improve ME Institute; MSc Financial Mathematics, Imperial College London; BSc, UCL) and Jason Daswani (operational lead, Improve ME Institute; LSE).