Unit 9L Pressure & moments
Lesson 1 Pressure
Aim: Use the pressure equation to work out the pressure exerted by you on the floor.
Key words: pressure, force, Newton, area, m2
Starter: You may have heard of the word ‘pressure’ before. Can you think of any examples that you might like to tell the class? Mr C will demo the collapsing can experiment to show you a fun example of pressure in action.
Main: The amount of pressure exerted on an object can be calculated by dividing the force of an object with the area over which that force is applied. This is represented by the equation pressure (N/m2) = force (N)/area (m2). You need to be able to use this equation and rearrange it to solve problems.
If you struggle with rearranging equations then use the magic triangle to help you.
http://www.bbc.co.uk/schools/ks3bitesize/science/physics/forces_motion_4.shtml
Aim: Use the pressure equation to work out the pressure exerted by you on the floor.
Key words: pressure, force, Newton, area, m2
Starter: You may have heard of the word ‘pressure’ before. Can you think of any examples that you might like to tell the class? Mr C will demo the collapsing can experiment to show you a fun example of pressure in action.
Main: The amount of pressure exerted on an object can be calculated by dividing the force of an object with the area over which that force is applied. This is represented by the equation pressure (N/m2) = force (N)/area (m2). You need to be able to use this equation and rearrange it to solve problems.
If you struggle with rearranging equations then use the magic triangle to help you.
http://www.bbc.co.uk/schools/ks3bitesize/science/physics/forces_motion_4.shtml
Mr C will provide you with some problems to try and solve.
Finally you will work out the amount of pressure that you exert on the floor of the science lab. To do this you will need to work out your weight (remember this will be in Newtons) using some special scales that we have in the lab. You also need to work out the area of your feet. This can be done by drawing round the outline of your feet on squared paper to work out the area. You then simply need to plug your numbers into the pressure equation.
Plenary What did we learn today?
Homework None set today.
Curriculum links
Sc 3 1 b & Sc 4 2 g
Sc 1 2 g
No comments:
Post a Comment