Demonstration of pressure in solids practice exercise 3

A lady carries a basket of mangoes weighing 180 N on her head. The base of the basket has an area of 0.045 m². Calculate the pressure on her head.  (2marks)

A lady carries a basket of mangoes weighing 180 N on her head. The base of the basket has an area of 0.045 m². Calculate the pressure on her head.  (2marks)

A lady carries a basket of mangoes weighing 180 N on her head. The base of the basket has an area of 0.045 m². Calculate the pressure on her head.  (2 marks)

Look at the image below of a metal toolbox resting on two bricks placed flat on the ground. If the toolbox weighs 300 N and each brick has a contact area of 0.015 m², calculate the pressure exerted on the ground. (2marks)

Look at the image below of a metal toolbox resting on two bricks placed flat on the ground. If the toolbox weighs 300 N and each brick has a contact area of 0.015 m², calculate the pressure exerted on the ground. (2marks)

Look at the image below of a metal toolbox resting on two bricks placed flat on the ground. If the toolbox weighs 300 N and each brick has a contact area of 0.015 m², calculate the pressure exerted on the ground. (2 marks)

Look at the image below of a metal toolbox resting on two bricks placed flat on the ground. If the toolbox weighs 300 N and each brick has a contact area of 0.015 m², calculate the pressure exerted on the ground. (2 marks)

A car has a total weight of 12,000 N. The area of contact of each tyre with the road is 0.04 m². Calculate the pressure exerted on the road by the four tyres.  (2marks)

A car has a total weight of 12,000 N. The area of contact of each tyre with the road is 0.04 m². Calculate the pressure exerted on the road by the four tyres.  (2marks)

A car has a total weight of 12,000 N. The area of contact of each tyre with the road is 0.04 m². Calculate the pressure exerted on the road by the four tyres.  (2 marks)

A rectangular metal safe weighing 2,400 N is supported by four small metal legs. Each leg has a circular base with a radius of 0.03 m. Calculate the pressure exerted on the floor.  (3marks)

A rectangular metal safe weighing 2,400 N is supported by four small metal legs. Each leg has a circular base with a radius of 0.03 m. Calculate the pressure exerted on the floor.  (3marks)

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)

A large wooden crate weighing 1,800 N rests on a flat surface with a contact area of 0.9 m². A worker tilts the crate so that it rests on one of its edges with a contact area of 0.2 m². Calculate the change in pressure exerted on the floor and explain the effect on the floor surface.  (4 marks)

A large wooden crate weighing 1,800 N rests on a flat surface with a contact area of 0.9 m². A worker tilts the crate so that it rests on one of its edges with a contact area of 0.2 m². Calculate the change in pressure exerted on the floor and explain the effect on the floor surface.  (4 marks)

A large wooden crate weighing 1,800 N rests on a flat surface with a contact area of 0.9 m². A worker tilts the crate so that it rests on one of its edges with a contact area of 0.2 m². Calculate the change in pressure exerted on the floor and explain the effect on the floor surface.  (4 marks)

A large wooden crate weighing 1,800 N rests on a flat surface with a contact area of 0.9 m². A worker tilts the crate so that it rests on one of its edges with a contact area of 0.2 m². Calculate the change in pressure exerted on the floor and explain the effect on the floor surface.  (4 marks)

 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)

A steel filing cabinet weighing 600 N stands on four small wheels. Each wheel has a contact area of 0.0005 m². Calculate the pressure on the floor and discuss whether placing the cabinet on a wooden floor could cause damage.  (3marks)

A steel filing cabinet weighing 600 N stands on four small wheels. Each wheel has a contact area of 0.0005 m². Calculate the pressure on the floor and discuss whether placing the cabinet on a wooden floor could cause damage.  (3marks)

A steel filing cabinet weighing 600 N stands on four small wheels. Each wheel has a contact area of 0.0005 m². Calculate the pressure on the floor and discuss whether placing the cabinet on a wooden floor could cause damage.  (3 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 heavy object weighing 5,000 N is placed at the center of the plank, making it rest on the rollers as shown below. The contact area of each roller with the plank is 0.004 m². Calculate the pressure exerted by the plank on each roller.  (2marks)

A heavy object weighing 5,000 N is placed at the center of the plank, making it rest on the rollers as shown below. The contact area of each roller with the plank is 0.004 m². Calculate the pressure exerted by the plank on each roller.  (2marks)

A heavy object weighing 5,000 N is placed at the center of the plank, making it rest on the rollers as shown below. The contact area of each roller with the plank is 0.004 m². Calculate the pressure exerted by the plank on each roller.  (2 marks)