Each strip in the drawing shows the recorded positions of a sphere moving along a 10 m long horizontal track from left to right. The time interval between any two consecutive positions is 1.0 second. What is the average speed of the sphere in strip F? Please enter unir as “m/s”.
Read DetailsA man parks his car in a public park’s packing lot, then walks 1.5 mile to the east, 2.0 mile {a}° north of east, and then 0.2 mile to the north to find his friends who are having a picnic party. How far is the man from his parked car in direct line distance? Express your answer in miles with two significant figures. Please enter unit in the form of “mile”.
Read DetailsA fireman directs a stream of water from a ground-level fire hose and tries to hit a flame on the third floor of a building. Assuming that the fireman is 6.00 meter from the base of the building and that the speed of the stream as it leaves the hose is {vo} m/s at an angle of 60.0° above horizontal, how high does the stream hit? Enter your unti as “m”.
Read DetailsA package containing emergency medical supplies is dropped by a Red Cross helicopter in a remote village in Africa. Assume the helicopter is hovering in the air and the maximum allowed package landing speed without damaging the supplies is {v} m/s, what is the minimum height in meters that the helicopter must be when releasing the package? Use 9.80 m/s2 as the gravitational acceleration constant. Please enter unit in the form of “m”.
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