Предмет: Физика, автор: vayoxiru

Какова кинетическая энергия автомобиля массой 500 кг, движущегося со скоростью 36 км/ч? (Ответ дайте в джоулях.)

Ответы

Автор ответа: tagyoureit

$E= frac{mv^2}{2} = frac{500*(10)^2}{2} =25000$ Дж.

Автор ответа: Joanne

опять по формуле и получится 25000 дж

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Amelia Earhart
Amelia Earhart was an American aviator to set many records for her time. She was one
of the first women who pioneered aviation in general. She was the first to complete a solo
flight across the Atlantic Ocean and from Hawaii to the U.S. mainland.
Amelia Earhart disappeared in 1937 in an attempt to circumnavigate the globe
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adds to the number of the unsolved mysteries of the 20th century.
Amelia was born in Atchison, Kansas, on July 24th, 1897. She led an active way of life
hardly characteristic of the girls of her age: she played basketball and attended a car repair
course.
During WWI she was engaged as a nurse of the Red Cross. At that time she developed
an interest in aircrafts and spent a lot of time watching planes fly in Toronto, Canada.
Amelia set out on her first flight with one of the renowned pilots of the time, Frank
Hawks, in December 1920 and became obsessed with flying.
Her flying lessons began in 1921. Amelia had to work as a clerk at a telephone
company to support herself and to pay for the lessons. Some time later she bought her first
airplane, a secondhand Kinner Airster, which got the name ‘Canary’. Having obtained her
license from the National Aeronautics Association in 1921, she took part in her first flight
exhibition in California.
Amelia Earhart is known to have set a number of records: she was the first woman to
fly solo at a height above 14,000 feet, to cross the Atlantic, to fly across the U.S. and some
others.
On June 1st, 1937 Amelia took off from Oakland flying eastwards. She was eager to
become the first pilot ever to circumnavigate the world.
She was accompanied by a navigator. Together they had covered 22,000 miles before
they reached New Guinea on June 29th. Around 7,000 miles were left to reach Oakland.
The plane disappeared on July 2nd. A two-week search was initiated by President
Roosevelt, and then the crew was officially reported lost at sea. Many theories have been
proposed since that time concerning the case. The plane might have run out of fuel and
crashed into the ocean. They might have landed on an uninhabited island somewhere in the
Pacific and then disappeared. They even might have survived for a period of time on the
island. There exist some conspiracy theories stating that both Emily and her companion
served as spies or that they were captured and executed by the Japanese.
The most recent evidence has probably thrown light on the accident. A photograph has
been found in the National Archives. In the photo there is a ship towing another vessel with
an airplane on the deck. Several people may be distinguished on a nearby dock.
It is arguable that the photo had been taken before 1943. The experts are inclined to
confirm the authenticity of the picture. The people in the photo are presumably Earhart and
Noonan, the navigator. The ship has been identified as the Japanese military craft which took
the crew on board after the crash.
1. Amelia Earhart was the first pilot woman ever.
1) True 2) False 3) Not stated
2. It was her third attempt to fly around the world.
1) True 2) False 3) Not stated
3. Amelia differed from most girls of her age.
1) True 2) False 3) Not stated
4. Amelia set the maximum number of records for that time.
1) True 2) False 3) Not stated
5. The plane crashed halfway to the initial point.
1) True 2) False 3) Not stated
6. The missing plane was found but the crew was not.
1) True 2) False 3) Not stated
7. There is a slight probability that the plane in the picture really belonged to Amelia
Earhart.
1) True 2) False 3) Not stated

Ка­ко­ва ки­не­ти­че­ская энер­гия ав­то­мо­би­ля мас­сой 500 кг, дви­жу­ще­го­ся со ско­ро­стью 36 км/ч? (Ответ дайте в джо­у­лях.)

Ответы

Какова кинетическая энергия автомобиля массой 500 кг, движущегося со скоростью 36 км/ч? (Ответ дайте в джоулях.)