第四章测试1.A particle moves from the position
m to 
m in 2 s. What is the average velocity 
of this motion （ ）。A:
m/s
B:
m/s
C:
m/s
D:
m/s
答案:B
2.A particle moves with a constant acceleration
. If its initial velocity is 
m/s, what is the velocity of the particle at t = 2 s. （ ）A:
m/s
B:
m/s
C:
m/s
D:
m/s
3.For a two-dimensional velocity 
, the change of velocity may happen as（ ）。A:change of
B:change of 
C:change of the angle between 
and 
D:change of both 
and 
4.A particle undergoes a uniform circular motion. Which of the following statements are correct.（ ）。A:The radial component of acceleration is zero B:The magnitude of displacement equals to the distance for any time interval C:The tangential component of acceleration is zero D:The magnitude of velocity equals to the speed 5.For a projectile motion from the ground, the maximum lateral distance can be achieved as the launching angle is
. （ ）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!
