Предмет: Физика, автор: БумажныйЧеловек

На тело массой m=1кг в течение времени t=2 с действует сила, модуль которой F=1H. Если начальная кинетичсекая энергия тела равна нулю, то его конечная кинетичсекая энергия составит:

Ответы

Автор ответа: TAAAAA

По второму закону Ньютона для импульсов Ft = mv - mv0, (v0 = 0)v = Ft / m = 1H*2c /1 кг = 2 м/сКинетическая энергия Ek = mv^2 / 2 = 1кг*( 2 м/с)^2 / 2 = 2Дж

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a) A new dress.
b) A Bad Day.
c) New Address.
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1) Once a Frenchman went to Paris and stopped at a hotel.
2) First of all he bought a new dress for his wife.
3) He left the hotel and saw a long street.
4) In every street there was nothing interesting.
5) In the evening he realized that he lost his money.
6) Before going to bed he got a telegram from his wife.

3. Choose the correct answer to the questions:

1) Where did an Englishman stop?

a) In a motel.
b) In a hostel.
c) In a hotel.
d) In a camp.

2) What was there in every street?

a) Something interesting.
b) Nothing interesting.
c) Many places of interest.
d) Many interesting books.

3) Where did the Englishman go?

a) To the first restaurant
b) To the first hotel
c) To the post office
d) To the cinema

4) What did the Englishman send to his wife?

a) His new Paris address
b) A nice new dress
c) A telegram
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