Questions
An open topped rail road car of mass M has an initial velocity
detailed solution
Correct option is B
The rain drops falling vertically with velocity u do not affect the momentum along the horizontal track. A vector has no component in a perpendicular direction Rain drops add to the mass of the carMass added in t sec = (mt)kgMomentum is conserved along horizontal track.Initial mass of car = MInitial velocity of car = v0 Final velocity of (car + water) = vMass of (car + water) after time t = (M + m)∴ Final momentum = Initial momentum(M+mt)v=Mv0 ∴v=Mv0(M+mt)Talk to our academic expert!
Similar Questions
A train is moving with velocity 20 m/sec. on this dust is falling at the rate of 50 kg/minute. The extra force required to move this train with constant velocity will be
799 666 8865
support@infinitylearn.com
6th Floor, NCC Building, Durgamma Cheruvu Road, Vittal Rao Nagar, HITEC City, Hyderabad, Telangana 500081.
JEE Mock Tests
JEE study guide
JEE Revision Notes
JEE Important Questions
JEE Sample Papers
JEE Previous Year's Papers
NEET previous year’s papers
NEET important questions
NEET sample papers
NEET revision notes
NEET study guide
NEET mock tests