Question

ДАЮ 50 БАЛЛОВВ ботинках,площадь подошв которых 300см^2,ученик оказывает давление на пол.равное 15 кПа.Какое давление на лед будет оказывать этот ученик .стоя на коньках,если площадь лезвия одного конька равна 4см^2. Все расписать.

Answer 1

Я попробую ок)
думаю надо что то связать с пропорцией)
это значит
300см^2/2×4 см^2=37.5-настолько уменьш.площадь
и это же значит что давление во столько раз увеличится)
37.5×15000Па=562500
Па=562,5 кПа
вот вроде понятно удачи :)

Answer 2

Calculation of Pressure on the Floor

To calculate the pressure exerted by the student on the floor while standing on their shoes, we can use the formula:

Pressure = Force / Area

Given that the area of the shoe's sole is 300 cm^2 and the pressure exerted on the floor is 15 kPa (kiloPascals), we can calculate the force exerted by the student on the floor.

Converting the area from cm^2 to m^2: 300 cm^2 = 300 / 10000 m^2 = 0.03 m^2

Now, we can calculate the force exerted by the student on the floor using the formula:

Force = Pressure x Area

Substituting the values: Force = 15 kPa x 0.03 m^2

To perform the calculation, we need to convert kPa to Pa (Pascals): 1 kPa = 1000 Pa

Substituting the values and converting kPa to Pa: Force = 15,000 Pa x 0.03 m^2

Calculating the force: Force = 450 N (Newtons)

Therefore, the force exerted by the student on the floor while standing on their shoes is 450 N.

Calculation of Pressure on the Ice

To calculate the pressure exerted by the student on the ice while standing on ice skates, we can use the formula:

Pressure = Force / Area

Given that the area of one skate blade is 4 cm^2, we can calculate the pressure exerted by the student on the ice.

Converting the area from cm^2 to m^2: 4 cm^2 = 4 / 10000 m^2 = 0.0004 m^2

Now, we can calculate the force exerted by the student on the ice using the formula:

Force = Pressure x Area

Substituting the values: Force = Pressure x 0.0004 m^2

To calculate the force, we need to know the pressure exerted by the student on the ice. However, the pressure on the ice is not