You need to unblock this content by setting your broser.
ブラウザーはこの内容をブロックしないように設定してください。

INFO:
An object of mass 20kg slides down an inclined plane at an angle of 30o to the horizontal. The coefficient of static friction is? [g = 10ms-2]
An object of mass 20kg slides down an inclined plane at an angle of 30o... - Myschool