A boat is traveling upstream at 13 km/h with respect to the water of a river. The water is flowing at 8.0 km/h with respect to the ground. What are the (a) magnitude and (b) direction of the boat's velocity with respect to the ground? A child on the boat walks from front to rear at 6.0 km/h with respect to the boat. What are the (c) magnitude and (d) direction of the child's velocity with respect to the ground? (a) Number (b) i (d) ✪ (c) Number i ✪ Units Units ✪ ✪

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Projectile Motion