Question

hey guys!


please help me to solve the c. part


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Answer 1

Velocity of Monkey

with respect to ground is – VM

Velocity of Monkey

with respect to train A is - VA

Relative velocity of

Monkey with respect to train A - VMA

VMA = VM

- VA

Given - Velocity of

Monkey with respect to train A = VA = 54 Km/h = 54 x 5/18 m/s = 15

m/s

And Relative velocity

of Monkey with respect to train A = VMA = -18 Km/h = -18 x 5/18 = -5

m/s

(as monkey running

against the motion)

Therefore,

VMA = VM

- VA

-5 m/s = VM

– 15 m/s

VM = -5 m/s

+ 15 m/s

VM = 10 m/s

Answer - The velocity of a monkey running on roof

of a train A against its motion is 10 m/s