A river current has a velocity of 10 km/h related to the shore and a boat moves in the same direction as a current of 10 km/h re

Question

4 years ago

11

lated to the River how can the velocity of the boat related to the shore fee calculated

2 answers:

STatiana [176] · Answer 1 · 2021-11-28T18:12:51+03:00

Answer: Relative velocity of the boat with respect to shore is 20 km/h.

Explanation;

Relative velocity of the river with respect to shore,V = 10 km/h

Velocity of the shore = 0 km/h

Relative velocity of the river with respect to shore:

$V=V_r-V_s$

$10 km/h=V_r-0km/h$

Velocity of the river $V_r$ = 10 km/h

Velocity of the boat = $V_b$ = ?

Relative velocity of the boat with respect to river ,V'= 10 km/h

$V'=V_b-V_r$

$10 km/h=V_b-10 km/h$

$V_b=20 km/h$

Velocity of the boat $V_b$ = 20 km/h

Relative velocity of the boat with respect to shore, V":

$V"=V_b-V_s=20 km/h-0 km/h=20 km/h$

Relative velocity of the boat with respect to shore is 20 km/h.

Diano4ka-milaya [45] · Answer 2 · 2021-11-28T20:31:26+03:00

6 0

20 km/hr. Velocity is magnitude and direction. If two vectors are going in the same direction, you just add the magnitude.