Halliday Fun tals of Physics 10e ent Chapter 04 Problem 070

Halliday, Fun tals of Physics, 10e ent Chapter 04, Problem 070 A boat is traveling upstream at 11 km/h with respect to the water of a river. The water a foming at o.o kmvh with rescuct to the ground what avu the (a) magntude and (bs urd Achi dan the boat wal strom rotterr·t 5 kmh with \'espet to theboatimat ae the c magritude and(4) dection of the chin ve ot, th e oct to the guno (a) Number (c) Number units used sn·ro.um. Question Attempts: 0 of s Mplevet

Solution

a)

velocity of the boat with respect to the ground

= velocity of the river with respect to ground + velocity of the boat with respect to the river.

= 9 + 11

= 20 km/hr

b) directin is the same as the flow of water.

c) velocity of the child with respect to the ground

= velocity of the boat with respect to the groud - velocity of the child

= 20-5

=15 km/hr

d) its direction is also same as the direction of the river.