An airplane needs to travel to a city 350 km due north. There is a wind blowing due east at 40 m/s. If the airplane main
Posted: Thu Jul 07, 2022 2:07 pm
A student who can swim with a speed of 2 m/s in still water wants to get to the other side of a 334 m wide river whose waters flows downstream at 1 m/s. If she swims across in such a way that the time taken is the smallest possible, how far D is she swept downstream of the point on the opposite bank directly across from her starting point? A) 133 m B) 167 m C) 173 m D) 194 m E) 200 m
85 m A) 9.80 m/s VANO 45 m A roller coaster of mass, m= 200 kg, starts from rest at the top of a 85 m high hill. Assume the track is frictionless up until point D. What is the speed of the coaster at the top of the loop (point C)? OB) 12.2 m/s OC) 14.7 m/s D) 17.1 m/s DE) 19.6 m/s 70m
A river is 120 m wide and the water is flowing at a rate of 2 m/s. A swimmer jumps into the river and points directly across the river. He is swept a distance of 85 m downstream. How fast can this swimmer swim? A) 2.02 m/s B) 2.42 m/s OC) 2.82 m/s OD) 3.23 m/s OE) 3.63 m/s