It depends on how big the horse/pony is but, really if it's your horse,you should know!!
no, only if you want to rub the horse down. you have to use a proper horse brush
It's a brush you hold in your hand to use.
for what purpose would you use a body brush on a horse
you use a hoof pick
yes you can as long as you clean all the hair and dirt from it doing so is safe
For a horse with a short mane (pulled) you can rake through it with the human brush [unless it's really thin because raking breaks the hair so it will, not dramatically, but it will thin] For a horse with a long mane you can not use a human brush and you NEVER use it on a tail ESPECIALY when showing. Even more so in Arabs and dressage.
That would be a curry comb. You use the brush like this, in case you don't know: Make firm circular motions on the horse's coat. Then, when the dirt/mud/whatever is loosened, use the dandy brush (aka stiff brush) to brush the stuff of. You use that brush with a flick of the wrist.
A body brushand a plastic curry comb for stubborn mud.
A steady brush hand comes from practice and building up the needed muscles for holding the brush at the appropriate level.
Well a horse brush is the best thing to have, but if you currently do not have one then a nice scrubby wash cloth will work OK.
It is best if a hard or Dandy brush is not used on the face or lower legs as it can be too rough for these sensitive areas.
Your horse may not like this depending on how sensetive his skin is. Work up dirt and loose hair with a rubber curry then brush away with a stiff body brush. Use small flicks of the wrist and keep the brush hair-free by cleaning with a metal curry every few flicks. Try not to use the metal curry on your horse's coat though. Metal curries are for cleaning your brushes, not the horse's hair. Never use a stiff brush on your horse's more sensetive areas like his face and legs. Use a soft, smaller face brush on these places.