Question

friction produce heat suggest an activity to prove this

Answer 1

Yes some times in winter season we all feel cool and wear sweaters but sometimes we ourself rub our hands to make ourself warm so here we can the friction i.e rubbing hand produces heat so we feel hot

Answer 2

When two bodies come in contact with each other friction acts between them.
During friction mechanical energy is converted into heat energy.
Two sticks are rubbed together to generate fire , generally it takes a long time but the sticks get hot and eventually fire is generated.