题干

一个质点做方向不变的直线运动,加速度的方向始终与速度方向相同,但加速度的大小逐渐减小直至为零.则在此过程中          (     )

A:速度逐渐减小,当加速度减小为零时,速度达最小值

B:速度逐渐增加,当加速度减小为零时,速度达最大值

C:位移逐渐增大,当加速度减小为零时,位移将不再增大

D:位移逐渐减小,当加速度减小为零时,位移达最小值

上一题 下一题 0.0难度 选择题 更新时间:2018-10-04 10:37:50

答案(点此获取答案解析)

B

同类题4

阅读理解

    Science Museum, London

    Runs: Until 5 May

    Price: £7

    Exhibition about the Large Hadron Collider which uses theatre and video, as well as handmade works to recreate the experience of the real place and show the work behind the discovery of the Higgs 、 boson. Well worth it for anyone studying physics or simply interested.

    Weston Park Museum, Sheffield

    Runs: Until 5 May Price: Free for students

    Underneath the 1960s-built Castle Market in Sheffield, there are the remains of a historical castle. Now that the market is being moved, there has been a sudden growth in interest in the old castle.

    Seacity Museum, Southampton

    Runs: Continued

    Price: Entrance to the museum is £4.50 for students

    Explores the Titanic disaster and its effect on Southampton, where more than five-hundred families lost a family member to the disaster. The exhibition recreates the sights and sounds of 1912 Southampton and ends ill the Disaster Room, where a series of events from the moment of the Titanic hit the iceberg are explored using powerful oral description from survivors.

    The Guildhall, Leicester

    Runs: Until 1 June

    Price: Free

    This exhibition tells the history of King Richard III and of the search for his lost remains, eventually found underneath a car park two years ago. The exhibition can give visitors a rounded view of the life of the king and how he was discovered. Great for history students.