du 8:06 PM @ 45% edugen.Wileypus.com WileyPLUS af Physlics, 10 HW.4.Pty.1Chapter

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du 8:06 PM @ 45% edugen.Wileypus.com WileyPLUS af Physlics, 10 HW.4.Pty.1Chapter 04, Problem 070 A boat is traveling upstream at 12 km/h with respect to the water of a river, The water is flowing at 8.0 km/h with respect to the ground. What are the (a) magnitude and (b) direction of the boat's velocity with e respect to the ground? A child on the boat walks from front to rear at S.0 kmyh with respect to the boat.What are the (c) magnitude and (d) direction of the child's velocity with respect to the ground? (e) Mumber Quetion Assistance, you wil Policy st Attempts 0f 2 a Maximum

Explanation / Answer

Here ,

speed of boat , u = 12 km/hr

speed of river flow , v = 8 km/hr

a) for the velocity of boat relative to ground

velocity of boat relative to ground = u - v

velocity of boat relative to ground = 12 - 8

velocity of boat relative to ground = 4 km/hr

b) the direction velocity of boat relative to ground is upstream

c)

for the child , u1 = 5 km/hr

as the child is moving downstream

velocity of child relative to ground = 4- 5

velocity of child relative to ground = -1 km/hr

the velocity of child relative to ground is 1 km/hr

d) the direction velocity of child relative to ground is downstream

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