Answered

b. A swimmer's speed along the river (downstream) is 20 km/hr. and
can swim upstream at 8 km/hr. find velocity of stream and swimmers
possible speed in still water.
c. Can you have a zero velocity but non zero acceleration?
[3]
[1]

Answer :

GinnyAnswer

Final answer:

Calculate swimmer's speed in still water and velocity of stream. Understand the possibility of zero velocity with non-zero acceleration.


Explanation:

Swimmer's speed in still water can be calculated using the formula:

Velocity of swimmer in still water = (Speed downstream + Speed upstream) / 2

Velocity of stream can be found by calculating half the difference between downstream and upstream speeds. In this case, (20 km/hr - 8 km/hr) / 2 = 6 km/hr.

Zero velocity with non-zero acceleration is possible. An example is when an object is thrown upwards, momentarily stops at its highest point (zero velocity), and then accelerates downwards due to gravity.


Learn more about River Crossings here:

https://brainly.com/question/50829403


Other Questions