Breh, Sakura does not have power. Tsunade has power, raw power or strength, as shown when she lifted Gamabuta's knife and threw it during the Sannin fight in Part 1. Sakura has extreme chakra control which she uses to release chakra at the point of impact of her punches and kicks. It emulate's Tsunade's power which she learned during their training together. We are assuming Sarada has the same chakra control, which Sakura noticed, and then taught her how to release her own chakra in a similar manner. Sakura is as strong as the average woman her age (unlike Tsunade). Sorry, but not to come off as rude or condescending, but I've had to correct an ungodly amount of people who claim Sakura has super strength, when she doesn't. Nor does Sarada.