Предмет: Физика, автор: sergeybaluev

Во время удара по хоккейной шайбе массой 250 г, она движется с ускорением 1500 м/с^2. Определите силу удара.

Ответы

Автор ответа: IIIceMage
0
F=ma; m=0.25 кг; a=1500 м/с^2 Сдедовательно F=0.25*1500=25*15=375(H)
Автор ответа: sergeybaluev
0
Благодарю.
Автор ответа: IIIceMage
0
Незачто
Автор ответа: Аноним
0
Дано  m=0,25 кг  a=1500 м/с2    F- ?
по второму закону Ньютона
F = m*a=0,25*1500=375 Н
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Module 3 Test. Form 10 Variant 1 Name____________________________________________________




1.Fill in the gaps with the correct word: motivated,private,activities,training,uniform,attend,rules,sit,strict,public.


1.Students must wear a school_____________________________________ every day.


2.It is important for everyone to follow the ___________________________________ .


3.This school is known for its discipline and ____________________________ teachers.


4.Students are very _____________________________________ To do well at this school.


5.Do you use a bicycle or the _____________________________________transport system?




2. Fill in: on,out,up,at.


1. I used to get picked ___________________________________at school by the elder children.


2. I’ll pick you _______________________________________ from the station.


3. No wonder she’s thin. She only pick______________________________ her food.


4. Can you help me pick______________________________ a new dress?




3. Put the adjectives in brackets into the comparative or superlative form.


1. St. Petersburg is one of the (beautiful) _______________________________cities in the world.


2. The rivers in America are much (big) __________________________than those in England.


3. Moscow is the (large) ___________________________city in Russia.


4. What is the name of the (high) _____________________________ mountain in Asia?


5. The English Channel is (wide) __________________________ than the straits of Gibraltar.




4. Fill in the gaps with the correct future form (Future Simple, Future Perfect, Future Continuous, Present Continuous, be going to)


A: ________________________ (you/do) anything on Friday morning? B: No, I'm free.


A: Joe is going on holiday next week. B: Yes, I know. This time next week he _________________________ (fly) to Rome.


Martin _______________________________ (do) the work by Sunday evening.


My grandmother is very old. She ________________________(be) ninety next month.


This time tomorrow, I ___________________________________(leave) for the airport.


I _________________________________(collect) you from Peter's house on my way home.


‘How is your project coming along? Is it done?’ ‘Not yet, but I_____________________( finish) it by the time the holidays are over.’


‘What are your plans for the weekend?’ ‘I_________________________ (spend ) some time with my friends.’


Richard is such a poor guy, he has got the flu, but his elder sister ___________________________________(take) care of him, she’s a nurse.


-I ’m really hungry!


-Don’t worry. I ________________________________ (cook) dinner by the time you get home.




5. Fill in the correct word derived from the world in bold.


1. Kate is now the new managing _________________________________of the company. DIRECT


2. The ___________________________________was busy tidying the returned books. LIBRARY


3. The_______________________________________ searched through old documents for years before he was convinced the events had taken place. HISTORY

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