一道英文物理题求解（有点难 ）A block starts from rest and slides without friction along the surface of a hemisphere of radius R= 4.90 m. As the block slides, eventually it loses contact with the hemisphere.1.Select all the statements th

来源：学生作业帮助网 编辑：作业帮 时间：2024/11/06 06:36:17
一道英文物理题求解（有点难 ）A block starts from rest and slides without friction along the surface of a hemisphere of radius R= 4.90 m. As the block slides, eventually it loses contact with the hemisphere.1.Select all the statements th
xUOD*E)86iv9pzD==L6ZNB$Pz= [+U| 4~ތ QWRi~޳=^}6_-Ϟy7/=:yxyhLR} UFLɊ(ІP]4rSȉ"gKAh)ENLDOTFJ Ph'|<"]o#czEв<$ܐRj$dRʌ#v-^J"4 5P!E&ʿ}w2UNXI[ɧx!ZNaL3u!^By: ROK^?.uAk4ENka?4MYI!l12`af,8  (hХ=YRBZ= qM6˂`,@?H jڦ_/ez o먇I]^9[+ \,K(QPd3"G^wx06VJ%ЫJt@Cwܹ&5UЩtvn5kIT ގh=Ֆ;KCna0I$W΢RUl5,x oz][ΝU1~LUH9Tmd֑TNŔ]\p3I:V(76.A!AOh0&\I;%3§Z(: gKXouY$/)|Ԏ_[djg2KsXSypya,:dO hO]w3KiH\]>8ȱAi}'SW'/?pO?2p;US

一道英文物理题求解（有点难 ）A block starts from rest and slides without friction along the surface of a hemisphere of radius R= 4.90 m. As the block slides, eventually it loses contact with the hemisphere.1.Select all the statements th
一道英文物理题求解（有点难 ）

A block starts from rest and slides without friction along the surface of a hemisphere of radius R= 4.90 m. As the block slides, eventually it loses contact with the hemisphere.

1.Select all the statements that are correct; e.g., if A and D are correct and the rest are incorrect, enter AD. If none are correct, enter N. 


At the moment the block leaves the surface, its acceleration is parallel to its velocity.

Before the block leaves the surface of the hemisphere, the only forces that act on it are gravity and the normal force.

While the block slides along the surface of the hemisphere, its acceleration only has a component perpendicular to its velocity.

As the block slides downward, the magnitude of the normal force on the block increases.

The magnitude of the change in potential energy of the block as it moves is equal to the magnitude of the change in its kinetic energy.


2.When the block is at an angle θ=17.8°, what percentage of the block's weight is the component perpendicular to the surface of the hemisphere? Don't enter units.


3.When the block is at an angle θ=15.0°, what is the speed of the block? 


4.What is the speed of the block when it loses contact with the hemisphere? 


一道英文物理题求解（有点难 ）A block starts from rest and slides without friction along the surface of a hemisphere of radius R= 4.90 m. As the block slides, eventually it loses contact with the hemisphere.1.Select all the statements th
嗯,第一题选对错
正确的是BCE

求解一道物理题（过程） 一道英文物理题求解（有点难 ）A block starts from rest and slides without friction along the surface of a hemisphere of radius R= 4.90 m. As the block slides, eventually it loses contact with the hemisphere.1.Select all the statements th BLO 一道物理题求解 求解一道电场物理题 求解一道九年级物理题%>_ 一道物理题 第三题 求解 求解一道高中物理题,万有引力 一道英文(sat2)物理题 这是高一的一道物理题,我感觉有点难 一道画等效电路的物理题求解! 求解一道高中物理题 如图 物理题一道,求解,要计算过程 物理题一道,求解,要计算过程!急! 求解一道物理题?第8题 求解!一道算拉力的初二物理题(^-^) 物理题求解 帮我解析第六题,谢谢 （我觉得第六题有点问题） 一道物理题,为什么选A