一打点计时器固定在倾角为θ的斜面上,一小车拖着穿过打点计时器

一打点计时器固定在倾角为θ的斜面上,一小车拖着穿过打点计时器的纸带从斜面上滑下,打出的纸带的一段如图所示.纸带上0123456是计数点,每相邻计数点之间时间间隔为0.1s.

(1)如果小车系在纸带的左端,那么小车是做      直线运动(选填匀加速匀减速).

2)打计数点3时小车的速度大小为v3=              .

3)打计数点5时小车的速度大小为v5=             .

4)依据v3v5可求得加速度大小为a=              .

答案

1)加速运动    21.6m/s  32.4m/s 44m/s2.

相关题目

Father______for London on business upon my arrival,so I didn't see him.   
Father______for London on business upon my arrival,so I didn't see him.     A.has left    B.left    C.was leaving   D.had left
一辆汽车以20m/s的速度沿平直公路匀速行驶,突然发现前方
一辆汽车以20m/s的速度沿平直公路匀速行驶,突然发现前方有障碍物,立即刹车,汽车以大小是5m/s2的加速度做匀减速直线运动,那么刹车后2s内与刹
13.补写出下列名篇名句中的空缺部分。 (1)真的猛士,  
13.补写出下列名篇名句中的空缺部分。 (1)真的猛士,              ,              。 (2)《沁园春.长沙》中描写仰望与俯瞰之景
_______ provides many hours of air for astronauts in space.A.An air tankB.A
_______ provides many hours of air for astronauts in space.A.An air tankB.A power packC.A helmetD.A space sleeping bag
如图是氯碱工业中应用的立式隔膜电解槽示意图,其中的离
如图是氯碱工业中应用的立式隔膜电解槽示意图,其中的离子膜仅允许阳离子通过.下列说法正确的是( )A.加入的H2O可用稀NaCl溶液代替,以增加导
According to the news report, ______ have been injured in the big forest fire.
According to the news report, ______ have been injured in the big forest fire.   A. many a firefighter                 B. more than one firefighter   C. a great many firefighters  
 Could you tell me ______ see you? A. when to     B. when can   C. when
 Could you tell me ______ see you? A. when to     B. when can   C. when I       D. when could
圆x2+y2-4x=0在点P(1,)处的切线方程为……………………( 
圆x2+y2-4x=0在点P(1,)处的切线方程为……………………(    )A.x+y-2=0                                     B.x+y-4=0C.x-y+4=0   

最新题目