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A rather devious student has built himself a slingshot, with the idea of firing tomatoes off a cliff at his classmates down below. If the

A rather devious student has built himself a slingshot, with the idea of firing tomatoes off a cliff at his classmates down below. If the cliff is 7m tall, and his classmates are 12 m from the base, how much initial velocity must his tomatoes have to ensure him of hitting them?

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