A river has a steady speed of 0.480 m/s. a student swims upstream a distance of 1.00 km and swims back to the starting point. (a
1 answer:
Steady speed of river = 0.480 m/s
Swimming speed of student in still water = 1.40 m/s
When the student is swimming upstream the velocity he is going up = 1.40-0.48= 0.92 m/s
When the student is swimming downstream the velocity he is going down = 1.40+0.48= 1.88 m/s
Time taken to travel upstream =
Time taken to travel downstream =
Total time taken = 18.12+8.87 = 26.99 minutes
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Answer:
Explanation:
Acceleration is defined as the change in velocity divided by the time it took to produce such change. The formula then reads:
Where Vf is the final velocity of the object, (in our case 80 m/s)
Vi is the initial velocity of the object (in our case 0 m/s because the object was at rest)
and t is the time it took to change from the Vi to the Vf (in our case 0.05 seconds.
Therefore we have:
Notice that the units of acceleration in the SI system are (meters divided square seconds)