A boat from A crosses a 200 m wide river at a constant speed of 4 m/s with respect to the water flowing at a uniform speed of 1 m/s. Destination B is 80 m upstream from H, a point directly opposites A. (a) In what direction must the boat be pointed to travel from A to B?
(b) How long will the boat take to cross the river?

Cpowerlifting my boi

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction 

Each student aligns the edge of the object with the left edge of the ruler as shown above. all four students read the ruler with a measurement of 4.6 cm. which statement describes the data they collect? i believe the answer is: the data have poor precision and poor accuracy because of a systematic error.