Pressure practice exercise 1

A student tries to drink thick mango juice through a straw but finds it harder than drinking water. Using the concept of pressure differences, explain why. (2 marks)

A food processing company wants to design a vegetable cutter that slices hard vegetables with less effort. What blade characteristic should they focus on and why?  (1mark)

A food processing company wants to design a vegetable cutter that slices hard vegetables with less effort. What blade characteristic should they focus on and why?  (1mark)

A food processing company wants to design a vegetable cutter that slices hard vegetables with less effort. What blade characteristic should they focus on and why?  (1 mark)

A chef needs to cut ripe tomatoes without squashing them. Suggest the type of knife they should use and explain why.  (1mark)

A chef needs to cut ripe tomatoes without squashing them. Suggest the type of knife they should use and explain why.  (1mark)

A chef needs to cut ripe tomatoes without squashing them. Suggest the type of knife they should use and explain why.  (1 mark)

 A tractor weighing 40,000 N has four tyres, each with a contact area of 0.5 m² when inflated. If the tyres are slightly deflated, the contact area increases to 0.75 m² each. Calculate the difference in pressure exerted on the ground before and after deflation and explain the advantage of deflation when driving on soft ground.  (4marks)

 A tractor weighing 40,000 N has four tyres, each with a contact area of 0.5 m² when inflated. If the tyres are slightly deflated, the contact area increases to 0.75 m² each. Calculate the difference in pressure exerted on the ground before and after deflation and explain the advantage of deflation when driving on soft ground.  (4marks)

A tractor weighing 40,000 N has four tyres, each with a contact area of 0.5 m² when inflated. If the tyres are slightly deflated, the contact area increases to 0.75 m² each. Calculate the difference in pressure exerted on the ground before and after deflation and explain the advantage of deflation when driving on soft ground.  (4 marks)

Workers use a compactor to press down loose gravel before tarmacking a road. Explain the importance of this step. (1mark)

Workers use a compactor to press down loose gravel before tarmacking a road. Explain the importance of this step. (1mark)

Workers use a compactor to press down loose gravel before tarmacking a road. Explain the importance of this step. (1 mark)

Look at the image below of two methods of stacking bricks on a soft surface: Why is Method B (bricks placed on a wooden plank) more important in real construction work?

Look at the image below of two methods of stacking bricks on a soft surface: Why is Method B (bricks placed on a wooden plank) more important in real construction work?  (1mark)

Look at the image below of two methods of stacking bricks on a soft surface: Why is Method B (bricks placed on a wooden plank) more important in real construction work?  (1mark)

Look at the image below of two methods of stacking bricks on a soft surface. Why is Method B (bricks placed on a wooden plank) more important in real construction work?  (1 mark)

Instructions: Study the image and choose the best answer (A–D). A bus in Nakuru has front tyres each in contact with the road over an area of 0.18 m². The total load on the front axle is 9000 N. Due to uneven loading, one tyre carries 500 N more than the other. Calculate the pressure on the tyre carrying more load. Tyre 1 Tyre 2

A bus in Nakuru has front tyres each in contact with the road over an area of 0.18 m². The total load on the front axle is 9000 N. Due to uneven loading, one tyre carries 500 N more than the other. Calculate the pressure on the tyre carrying more load. (1mark) Tyre 1 Tyre 2

A bus in Nakuru has front tyres each in contact with the road over an area of 0.18 m². The total load on the front axle is 9000 N. Due to uneven loading, one tyre carries 500 N more than the other. Calculate the pressure on the tyre carrying more load. (1mark) Tyre 1 Tyre 2

A bus in Nakuru has front tyres each in contact with the road over an area of 0.18 m². The total load on the front axle is 9000 N. Due to uneven loading, one tyre carries 500 N more than the other. Calculate the pressure on the tyre carrying more load. (1 mark)

A water tank is placed 10 metres above the roof of a house. How does this help water flow to the kitchen tap?

A water tank is placed 10 metres above the roof of a house. How does this help water flow to the kitchen tap? (1 mark)

A water tank is placed 10 metres above the roof of a house. How does this help water flow to the kitchen tap? (1 mark)

A water tank has a flat base with an area of 2 m² and is filled with water to a height of 1 m. Find the total force on the base. Density of water = 1000 kg/m³, g = 10 N/kg.

A water tank has a flat base with an area of 2 m² and is filled with water to a height of 1 m. Find the total force on the base. Density of water = 1000 kg/m³, g = 10 N/kg. (1 mark)

A water tank has a flat base with an area of 2 m² and is filled with water to a height of 1 m. Find the total force on the base. (Density of water = 1000 kg/m³, g = 10 N/kg). (1 mark)

A weather forecaster observes falling atmospheric pressure in a region. What is likely to happen?

A weather forecaster observes falling atmospheric pressure in a region. What is likely to happen? (1 mark)

A weather forecaster observes falling atmospheric pressure in a region. What is likely to happen? (1 mark)

The diagram shows a U-tube connected to a tank filled with oil of density 900 kg/m³. The U-tube is open to the atmosphere on one side. The oil level in the tank is 2.5 m above the point where the U-tube is connected. Calculate the pressure at this connection point in Pascals. Take g = 10 N/kg. (2 marks)

The diagram below shows a U-tube connected to a tank filled with oil of density 900 kg/m³. The U-tube is open to the atmosphere on one side. The oil level in the tank is 2.5 m above the point where the U-tube is connected. Calculate the pressure at this connection point in Pascals. Take g = 10 N/kg. (2 marks)

The diagram below shows a U-tube connected to a tank filled with oil of density 900 kg/m³. The U-tube is open to the atmosphere on one side. The oil level in the tank is 2.5 m above the point where the U-tube is connected. Calculate the pressure at this connection point in Pascals. Take g = 10 N/kg. (2 marks)

A wooden chair weighs 240 N. The four legs of the chair each have an area of 0.0025 m² in contact with the floor. Calculate the pressure the chair exerts on the floor.  (2marks)

A wooden chair weighs 240 N. The four legs of the chair each have an area of 0.0025 m² in contact with the floor. Calculate the pressure the chair exerts on the floor.  (2marks)

A wooden chair weighs 240 N. The four legs of the chair each have an area of 0.0025 m² in contact with the floor. Calculate the pressure the chair exerts on the floor.  (2marks)

A wooden chair weighs 240 N. The four legs of the chair each have an area of 0.0025 m² in contact with the floor. Calculate the pressure the chair exerts on the floor.  (2 marks)

A wooden chair weighs 240 N. The four legs of the chair each have an area of 0.0025 m² in contact with the floor. Calculate the pressure the chair exerts on the floor.  (2 marks)

Explain why a sharp knife cuts vegetables more easily than a blunt one, using the concept of pressure in solids.  (1mark)

Explain why a sharp knife cuts vegetables more easily than a blunt one, using the concept of pressure in solids.  (1mark)

Explain why a sharp knife cuts vegetables more easily than a blunt one, using the concept of pressure in solids.  (1 mark)

A school laboratory wants to install heavy shelves on a vinyl floor. What should they do to prevent the shelves from damaging the floor?  (2marks)

A school laboratory wants to install heavy shelves on a vinyl floor. What should they do to prevent the shelves from damaging the floor?  (2marks)

A farmer is pushing a wheelbarrow full of manure on soft muddy ground. The narrow wheels sink into the soil. What can he do to reduce sinking?

A farmer is pushing a wheelbarrow full of manure on soft muddy ground. The narrow wheels sink into the soil. What can he do to reduce sinking?  (1mark)

A farmer is pushing a wheelbarrow full of manure on soft muddy ground. The narrow wheels sink into the soil. What can he do to reduce sinking?  (1mark)

A farmer is pushing a wheelbarrow full of manure on soft muddy ground. The narrow wheels sink into the soil. What can he do to reduce sinking?  (1 mark)