A hotel elevator ascends 170m with a maximum speed of, Ask an Expert

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Q1. Two boats start together and race across a 50.0 km wide lake and back. Boat A goes across at 50.0 km/h and returns at 50.0 km/h. Boat B goes across at 25km/h, and its crew, realizing how far behind it is getting, returns at 75km/h.

Q2. A hotel elevator ascends 170m with a maximum speed of 4.4m/s. Its acceleration and deceleration both have a magnitude of 1m/s2.

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