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.
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.
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.
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.