A car of mass 1200 kg travelling with sp...

A car of mass 1200 kg travelling with speed of 60 km/h on a straight road is ahead of a scooter travelling with speed of 60 km/h, then what will the speed of centre of mass of these vehicles? Mass of scooter is 80kg

`60km//h`

`72km//h`

`75km//h`

`68km//h`

Text Solution

Verified by Experts

The correct Answer is:

Speed of centre of mass
`v_(cm)=(m_(1)v_(1)+m_(2)v_(2))/(m_(1)+m_(2))`
`=(1200xx60+80xx60)/(1200+80)`
`=(72000+4800)/(1280)=(76800)/(1280)`
`=60km//h`

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