Ingrid is jogging at 9 km/h, she tosses a relay stick at 16 km/h to her teammate. how fast is the relay stick moving relative to ingrid ?

Agroup of monkeys is trying to cross the river in a rowboat. the maximum buoyant force on the rowboat is 2,000 n. the weight of the rowboat is 1,000 n. each monkey has a weight of 150 n. how many monkeys can safely cross in the rowboat at one time? explain your reasoning, including any calculations you used to find the answer.