1)
What is the definition of "Merkav"?
1.
Rashi: "Merkav" is (not the saddle on which he sits, but) the vertical projecting part of the saddle (which the rider holds on to for support). 1
2)
What is the difference between Tum'as Mishkav and Moshav and Tum'as Merkav>
1.
Oznayim la'Torah: The former require Kibus Begadim, the latter does not.
3)
Why does the Torah insert the (otherwise superfluous) word "ve'Chol ha'Merkav asher Yishkav alav"?
1.
Sifra: To teach us that the Din of Tum'as Merkav is confined to the (wooden) projection of the saddle and not to Mishkav and Moshav.
