Demonstration of pressure in solids practice exercise 4

Instructions: Study the image and choose the best answer (A–D). During a science demonstration, two identical bricks each weighing 200 N are placed on soft clay: Brick A on its narrow edge (area = 0.04 m²) and Brick B on its wide face (area = 0.12 m²). Which brick will sink deeper into the clay? A (0.04 m²) B (0.12 m²) Soft Clay Soft Clay

During a science demonstration, two identical bricks, each weighing 200 N, are placed on soft clay. Brick A is placed on its narrow edge, which has an area of 0.04 m², and Brick B on its wide face, which has an area of 0.12 m². Which brick will sink deeper into the clay?  (1mark) A (0.04 m²) B (0.12 m²) Soft Clay Soft Clay

During a science demonstration, two identical bricks, each weighing 200 N, are placed on soft clay. Brick A is placed on its narrow edge, which has an area of 0.04 m², and Brick B on its wide face, which has an area of 0.12 m². Which brick will sink deeper into the clay?  (1mark) A (0.04 m²) B (0.12 m²) Soft Clay Soft Clay

During a science demonstration, two identical bricks, each weighing 200 N, are placed on soft clay. Brick A is placed on its narrow edge, which has an area of 0.04 m², and Brick B on its wide face, which has an area of 0.12 m². Which brick will sink deeper into the clay?  (1mark) A (0.04 m²) B (0.12 m²) Soft Clay Soft Clay

During a science demonstration, two identical bricks, each weighing 200 N, are placed on soft clay. Brick A is placed on its narrow edge, which has an area of 0.04 m², and Brick B on its wide face, which has an area of 0.12 m². Which brick will sink deeper into the clay?  (1mark) A (0.04 m²) B (0.12 m²) Soft Clay Soft Clay

During a science demonstration, two identical bricks, each weighing 200 N, are placed on soft clay. Brick A is placed on its narrow edge, which has an area of 0.04 m², and Brick B on its wide face, which has an area of 0.12 m². Which brick will sink deeper into the clay?  (1 mark) A (0.04 m²) B (0.12 m²) Soft Clay Soft Clay

Instructions: Choose the best answer (A–D). A 2 m metal post weighs 500 N and stands upright on a base plate measuring 10 cm × 10 cm. Due to uneven load from wind, 300 N of extra force is applied vertically on the base. Calculate the pressure on the soil under the base.

A 2 m metal post weighs 500 N and stands upright on a base plate measuring 10 cm × 10 cm. Due to uneven load from wind, 300 N of extra force is applied vertically on the base. Calculate the pressure on the soil under the base.  (1mark)

A 2 m metal post weighs 500 N and stands upright on a base plate measuring 10 cm × 10 cm. Due to uneven load from wind, 300 N of extra force is applied vertically on the base. Calculate the pressure on the soil under the base.  (1mark)

A 2 m metal post weighs 500 N and stands upright on a base plate measuring 10 cm × 10 cm. Due to uneven load from wind, 300 N of extra force is applied vertically on the base. Calculate the pressure on the soil under the base.  (1mark)

A 2 m metal post weighs 500 N and stands upright on a base plate measuring 10 cm × 10 cm. Due to uneven load from wind, 300 N of extra force is applied vertically on the base. Calculate the pressure on the soil under the base.  (1mark)

A 2m metal post weighs 500 N and stands upright on a base plate measuring 10 cm × 10 cm. Due to uneven load from wind, 300 N of extra force is applied vertically on the base. Calculate the pressure on the soil under the base.  (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. (1 mark)

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

Instructions: Choose the best answer (A–D). Machine X has a flat plate of 0.5 m² pressing down with 4000 N. Machine Y has a narrow plate of 0.05 m² pressing down with 800 N. Which machine exerts higher pressure, and by how much?

Machine X has a flat plate of 0.5 m² pressing down with 4000 N. Machine Y has a narrow plate of 0.05 m² pressing down with 800 N. Which machine exerts higher pressure, and by how much?  (1mark)

Machine X has a flat plate of 0.5 m² pressing down with 4000 N. Machine Y has a narrow plate of 0.05 m² pressing down with 800 N. Which machine exerts higher pressure, and by how much?  (1mark)

Machine X has a flat plate of 0.5 m² pressing down with 4000 N. Machine Y has a narrow plate of 0.05 m² pressing down with 800 N. Which machine exerts higher pressure, and by how much?  (1 mark)

Instructions: Choose the best answer (A–D). In a Kisumu school, students push a metal rod into soft soil using the same force. Rod X has a sharp tip, and Rod Y has a blunt tip. Which rod goes deeper and why?

In a Kisumu school, students push a metal rod into soft soil using the same force. Rod X has a sharp tip, and Rod Y has a blunt tip. Which rod goes deeper and why? (1mark)  

In a Kisumu school, students push a metal rod into soft soil using the same force. Rod X has a sharp tip, and Rod Y has a blunt tip. Which rod goes deeper and why? (1mark)  

In a Kisumu school, students push a metal rod into soft soil using the same force. Rod X has a sharp tip, and Rod Y has a blunt tip. Which rod goes deeper and why? (1 mark)  

In a Kisumu school, students push a metal rod into soft soil using the same force. Rod X has a sharp tip, and Rod Y has a blunt tip. Which rod goes deeper and why? (1 mark)  

In a Kisumu school, students push a metal rod into soft soil using the same force. Rod X has a sharp tip, and Rod Y has a blunt tip as shown below. Which rod goes deeper and why? (1 mark)  

Instructions: Choose the best answer (A–D). A warehouse in Nairobi stores a 3000 N crate on two supports. One support is steel (contact area 0.015 m²) and the other is wood (contact area 0.025 m²). The crate’s weight is shared equally between the supports. What is the pressure on the steel support?

A warehouse in Nairobi stores a 3000 N crate on two supports. One support is steel (contact area 0.015 m²) and the other is wood (contact area 0.025 m²). The crate’s weight is shared equally between the supports. What is the pressure on the steel support?  (1mark)

A warehouse in Nairobi stores a 3000 N crate on two supports. One support is steel (contact area 0.015 m²) and the other is wood (contact area 0.025 m²). The crate’s weight is shared equally between the supports. What is the pressure on the steel support?  (1mark)

A warehouse in Nairobi stores a 3000 N crate on two supports. One support is steel (contact area 0.015 m²) and the other is wood (contact area 0.025 m²). The crate’s weight is shared equally between the supports. What is the pressure on the steel support?  (1mark)

A warehouse in Nairobi stores a 3000 N crate on two supports. One support is steel (contact area 0.015 m²) and the other is wood (contact area 0.025 m²). The crate’s weight is shared equally between the supports. What is the pressure on the steel support?  (1mark)

Instructions: Choose the best answer (A–D). At a boarding school in Nyeri, one table has damaged floor tiles under its legs. The legs have lost their rubber caps, leaving thin metal edges. Why are the tiles damaged?

At a boarding school in Nyeri, one table has damaged floor tiles under its legs. The legs have lost their rubber caps, leaving thin metal edges. Why are the tiles damaged?  (1mark)

At a boarding school in Nyeri, one table has damaged floor tiles under its legs. The legs have lost their rubber caps, leaving thin metal edges. Why are the tiles damaged?  (1mark)

At a boarding school in Nyeri, one table has damaged floor tiles under its legs. The legs have lost their rubber caps, leaving thin metal edges. Why are the tiles damaged?  (1 mark)

Instructions: Choose the best answer (A–D). In the canteen, a cook uses a wheel-shaped metal cutter to slice pastry for samosas. The thin sharp edge cuts faster than a thick blunt one with the same force. Why does the thin edge work better?

In the canteen, a cook uses a wheel-shaped metal cutter to slice pastry for samosas. The thin sharp edge cuts faster than a thick blunt one with the same force. Why does the thin edge work better?  (1mark)

In the canteen, a cook uses a wheel-shaped metal cutter to slice pastry for samosas. The thin sharp edge cuts faster than a thick blunt one with the same force. Why does the thin edge work better?  (1mark)

In the canteen, a cook uses a wheel-shaped metal cutter to slice pastry for samosas. The thin sharp edge cuts faster than a thick blunt one with the same force. Why does the thin edge work better?  (1 mark)

Instructions: Choose the best answer (A–D). During a science lesson in Eldoret, the teacher presses chalk against the board. When using the pointed end, the chalk leaves a darker mark than when using the flat side. Why does this happen?

During a science lesson in Eldoret, the teacher presses chalk against the board. When using the pointed end, the chalk leaves a darker mark than when using the flat side. Why does this happen?  (1mark)

During a science lesson in Eldoret, the teacher presses chalk against the board. When using the pointed end, the chalk leaves a darker mark than when using the flat side. Why does this happen?  (1mark)

During a science lesson in Eldoret, the teacher presses chalk against the board. When using the pointed end, the chalk leaves a darker mark than when using the flat side. Why does this happen?  (1 mark)

Instructions: Choose the best answer (A–D). A carpenter in Kisii uses a hammer to drive a nail of tip area 2 mm² into wood. He applies his own 200 N force plus 50 N from the hammer’s weight. Calculate the pressure at the tip. (1 mm² = 1×10⁻⁶ m²)

A carpenter in Kisii uses a hammer to drive a nail of tip area 2 mm² into wood. He applies his own 200 N force plus 50 N from the hammer’s weight. Calculate the pressure at the tip. (1 mm² = 1×10⁻⁶ m²)  (1mark)

A carpenter in Kisii uses a hammer to drive a nail of tip area 2 mm² into wood. He applies his own 200 N force plus 50 N from the hammer’s weight. Calculate the pressure at the tip. (1 mm² = 1×10⁻⁶ m²)  (1mark)

A carpenter in Kisii uses a hammer to drive a nail of tip area 2 mm² into wood. He applies his own 200 N force plus 50 N from the hammer’s weight. Calculate the pressure at the tip. (1 mm² = 1×10⁻⁶ m²)  (1 mark)

A carpenter in Kisii uses a hammer to drive a nail of tip area 2 mm² into wood. He applies his own 200 N force plus 50 N from the hammer’s weight. Calculate the pressure at the tip. (1 mm² = 1×10⁻⁶ m²)  (1 mark)