A swimmer who can consistently keep the same pace to cover 50 meters in 7.71 seconds sets out to swim across a river. The current in the river moves at 3.31 meters per second as the swimmer keeps a constant pace trying to get directly across (at a right angle to the current).  What is the actual speed of the swimmer compared to land? (Your answer should be in meters per second,

As a city planner, you receive complaints from local residents about the safety of nearby roads and streets. One complaint concerns a stop sign at the corner of Pine Street and 1st Street. Residents complain that the speed limit in the area (55 mph) is too high to allow vehicles to stop in time. Under normal conditions this is not a problem, but when fog rolls in visibility can reduce to only 155 ft. Since fog is a common occurrence in this region, you decide to investigate. The state highway department states that the effective coefficient of friction between a rolling wheel and asphalt ranges between 0.689 and 0.770, whereas the effective coefficient of friction between a skidding (locked) wheel and asphalt ranges between 0.450 and 0.617. Vehicles of all types travel on the road, from small VW bugs weighing 1210 lb to large trucks weighing 8640 lb. Considering that some drivers will brake properly when slowing down and others will skid to stop, calculate the minimum and maximum…

A stream is 30. Metres wide and its current flows southward at 1.5 meters per second. A toy boat is launched with a velocity of 2.0 metres per second eastward from the west bank of the stream. How much time is required for the boat to reach the opposite bank of the stream?

I am trying to find the total displacement of the graph