题干

将一个物体以10m/s 的速度从10m的高度水平抛出,求物体经过多长时间落地及落地时的速度是多少(不计空气阻力,取g取10m/s2).

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答案(点此获取答案解析)

解:根据h=
1
2
gt2
得:t= 2<

同类题4

阅读理解

What's On?

Trouble in Mind

    Alice Childress won an Off-Broadway award in 1956 for this story of a black actress rehearsing a play with a white director who increasingly finds it impossible for the show to go on. Tanya Moodie and Joseph Marcell star in the play directed by Laurence Boswell.

8.30p.m. —10.30p.m, Theatre Royal. Box office: 01225 448844.

Lazarus

    Inspired by the sci-fi (science fiction) novel and movie, The Man Who Fell to Earth, this musical deals with a hero, Thomas Newton. Likely to be the autumn's hottest ticket, the score includes new songs composed by Bowie.

7.00p.m. — 9.00p.m., King's Cross theatre. Box office: 0844 871 7604.

The Gaul

    On the night of 8 February 1974, a fisherman FV Gaul disappeared off the coast of Norway. For people on board, waiting for news was great suffering. Theories began to come up, including the possibility that the boat had fallen victim to cold war. Even when he was discovered, many still felt there were questions that remained unanswered. Mark Babych directs Janet Plater's play.

8.00p.m. —11.00 p.m., Royal Shakespeare theatre. Box office: 01482 323638.

The Suppliant Women

    It is a new version of Aeschylus's 2,500-year-old play about a group of women seeking shelter who make the long journey to escape forced marriage. It was written by David Greig and directed by Ramin Gray. An ancient piece asks a contemporary question: when we are in trouble, who will open their doors and give us a harbor?

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同类题5

阅读理解

    Many musicians meet and form a band(乐队)because they like to write and play their own music.They may start as a group of high school students and practise their music in someone's house.Sometimes they may play to passers-by in the street or underground so that they can get some money for themselves or pay for their instruments(乐器).

    However,there was one band that started in a different way.It was called the Monkees and was formed in 1965.It began as a TV show.The TV show had planned to find four rock musicians who could act as well as sing.But they could only find one who was good enough.They had to use actors for the other three members of the band.

    Since some of these actors could not sing well enough,they had to ask for help from other musicians.So at first,the band just pretended(假装)to sing.Anyway,their performances(演出)were excellent and they got lots of fans.Each week on TV,the Monkees would pretend to play and sing songs written by other musicians.After a year or so,they became more serious about their work.They started to play and sing their own songs like a real band.Then they produced(制作)their own records and started touring and playing their own music.In the US they became even more influential and popular than the Beatles and sold even more records.

    However,the band broke up around 1970.But happily they reunited(重聚)in the 1980s.They produced a new record in 1996 to celebrate their time as a band.It was very successful.Today the Monkees are still making music for their millions of fans.

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