THE TASKSTHE TASKS

ЗЗ АА ДД АА ЧЧ ИИ

IsaacIsaac NewtonNewton

Sir Isaac Newton was an English physicist, mathematician, astronomer, natural philosopher, alchemist

THE TASK № 1 ЗАДАЧА Каким должен быть коэффициент трения между

покрышками автомобиля и дорожным покрытием, чтобы он мог безопасно пройти поворот радиусом 70 м на плоской дороге со скорость. 55 км/ч?

How large must the coefficient of friction be between the tires and the road if a car is to round a level curve of radius 70 m at a speed of 55 km/h?

Fтр

а

РЕШЕНИЕ:

О т в е т: коэффициент трения должен быть

равен не менее 0,33.

THE TASK № 2 ЗАДАЧА

Ребенок массой 25 кг движется со скоростью 1,50 м/с на карусели, находясь в 7,0 м от ее центра. Найдите его центростремительное ускорение и действующую на него результирующую горизонтальную силу.

A child moves with a speed of 1.5 m/s when 7.0 m from the center of a merry-go-around. Calculate (a) the centripetal acceleration of the child and (b) the net horizontal force exerted on the child ( mass = 25 kg )

РЕШЕНИЕ:

ОО тт вв ее т:т:Центростремительное ускорение 0,32 м/с2 ; результирующая горизонтальная сила 8 Н.

QUESTIONS

1. How many solids/bodies always participate in the process of electrification?

2. The material that electrifies glass in the process of friction/rubbing.

3. The ancient Greek philosopher who was the first to describe electrification.

4. One of the various types of electrification.5. What can be seen in the dark in the process of

electrifying a cat?6. The word “amber” in the Greek language.7. Means of locomotion.

8. The substance/material that is easily electrified by friction on wool.

9. Which kind of electricity is connected with fixed/immobile charges?

10.What is happening in the process of interaction of similar/one-side charges?

11.The material that electrifies ebonite by friction.

12.The solid that has been used for electrification for a long time.

13.The sing of one of the various charge types.

14.Rubber with a large admixture of sulfur.

15.The American scientist who offered the division of charges into positive and negative.

16.The action which must be done with 2 solids for their mutual electrification.

17.The material/solid which is positively charge in the process of friction on paper.

18.Electricity connected with the fixed charges.

19. The phenomenon of a solid charging

ELECTRICAL SCHEMATIC

WHAT IS WRONG?

WHAT IS RIGHT?

WHAT IS MISSING ?

WHERE IS MISTAKE?WHERE IS MISTAKE?

WHAT IS WRONGWHAT IS WRONG??

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