find the resultant velocity of riverboat that steams 60 km/hr in still water , if travels upsteam against a river current that flows 5.0 km/hr
V=V(boat)-V(stream) = 60-5 =55 km/h
To find the resultant velocity of the riverboat, we need to consider the motion of the boat in still water and the motion of the river's current.
Given:
- The speed of the boat in still water is 60 km/hr.
- The speed of the river current is 5.0 km/hr.
When the boat travels upstream against the current, its effective speed will be reduced.
Formula to find the resultant velocity when traveling upstream:
Resultant velocity = Speed of the boat in still water - Speed of the river current
Substituting the given values:
Resultant velocity = 60 km/hr - 5.0 km/hr = 55.0 km/hr
Therefore, the resultant velocity of the riverboat when traveling upstream against a river current of 5.0 km/hr is 55.0 km/hr.