第三章测试1.A particle moves along x axis, from x = 0 m to x = 10 m and then back to x = 5 m. What are the displacement s and distance d of the motion （ ）
A:
答案:D
2.A particle moves with a constant acceleration from rest along x axis, from x = 0 m to x = 10 m in 5 s. What is the acceleration.（ ）
A:
B:
C:
D:
3.In linear motion, if the acceleration is opposite to the initial velocity, which of the following statements are correct.（ ）A:The distance for a particular time can be zero B:The average velocity for a particular time interval can be zero C:The displacement for a particular time interval can be zero D:The velocity at a particular time can be zero 4.The motion equation of a particle is
. At 
, which of the following results are correct. （ ）。A:velocity
B:acceleration 
C:acceleration 
D:velocity 
5.In linear motion, if the velocity does not change its direction, the magnitude of displacement will be equal to the distance. （ ）A:对 B:错
温馨提示支付 ￥3.00 元后可查看付费内容,请先翻页预览!
