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A bus of mass 2400 kg is moving on a str...

A bus of mass 2400 kg is moving on a straight road with a speed of 30 km/h. A car of mass 1600 kg is following the bus with speed of 40 km/h. How fast is the centre of mass of the system of two vehicles moving?

A

`70km//h`

B

`75km//h`

C

`34km//h`

D

`68km//h`

Text Solution

Verified by Experts

The correct Answer is:
C
`v_(cm)=(m_(1)v_(1)+m_(1)v_(2))/(m_(1)+m_(2))`
`=(2400xx30+1600xx40)/(2400+1600)`
`=(72000+64000)/(4000)`
`=(136000)/(4000)`
`=34km//h`
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