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A car has total mass 50 kg. Gases are ej...

A car has total mass 50 kg. Gases are ejected from this car backwards with relative velocity 20 m/s. The rate of ejection of gases is 2 kg/s. Total mass of gas is 20 kg. Coefficient of friction between the car and road is `mu=0.1`

Maximum speed of car will be v=.............m/s.

A

`0.6`

B

`0.8`

C

`1.0`

D

`1.2`

Text Solution

Verified by Experts

The correct Answer is:
A

`v = v ln ((m)/(m_(0))) - g t = 20 ln[(4)/(3)] - g t = 20 (0.28) - 5`
`= 5.6 - 5 = 0.6m//s`
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