You visited us 2 times! Enjoying our articles? Unlock Full Access!

Relative Velocity

Two parallel ...

Question

Two parallel rail tracks run north-south. Train A moves north with a speed of 54 km/h and train B moves south with a speed of 90 km/hr. What is the velocity of a monkey running on the roof of the train A against its motion (with its velocity of 18 km/h with respect to the train A) as observed by a man standing on the ground?

36 km/hr - North

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

36 km/hr - South

No worries! We‘ve got your back. Try BYJU‘S free classes today!

72 km/hr - North

No worries! We‘ve got your back. Try BYJU‘S free classes today!

72 km/hr - South

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A
36 km/hr - North

$\to v m o n k e y g r o u n d = ? {\to v}_{m g} = {\to v}_{m A} + {\to v}_{A g} = 18 - 54 = - 36 k m / h r$
Hence velocity of monkey will be 36 km/hr towards north.

Suggest Corrections

Similar questions

A

54 k m / h

B

90 k m / h

B

A

B

A

18 k m / h

A

k m h^{- 1}

90 k m h^{- 1}

k m h^{- 1}

.

54 k m / h

18 k m / h .

54 k h / h r

h^{- 1}

h^{- 1}

h^{- 1}

Join BYJU'S Learning Program