3.1 pressure
Post on 25-May-2015
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CHAPTER 3: FORCES & PRESSURE
Defined as force acting normally per unit area of the surface.
Unit : 1 Pa = 1 Nm-2
Factor affect the pressure ;Force area of the surfacemass
Factors affect the pressure
Example question;
1.The diagram given shows
the block of cuboid 0.5m x 0.7m
x 0.9m. Its weight is 15 N.
Calculate :
a) A maximum pressure
b) A minimum pressure
Applications :
1. knife, sole with studs, thumbtacks, etc.
2. Tyre of tractor, snowshoes, feet of elephant,
Exercise ;
exercise1. A pressure of 1000 Pa is acting on a floor of area 012. m2.
what is the resultant force produce?
2. A women wears a pair of shoes where the total surface area in contact is 60 cm2. if the pressure on the floor due to this woman is 75000 Nm-2, what is the weight of the woman?
3. A wooden cuboid has a dimension 0.4m ×0.01 m × 0.2 m and has a mass of 640 g. determine the smallest pressure produced by the cuboid when it is placed on a flat surface?
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