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QJEEM21Phdb32: JEE Main 2021 Physics - Class 11 JEEM21Phdb32 Solution: The initial mass of a rocket is 1000 kg. Calculate at what rate …

The initial mass of a rocket is 1000 kg. Calculate at what rate the fuel should be burnt so that the rocket is given an acceleration of 20 ms-2. The gases come out at a relative speed of 500 ms−1 with respect to the rocket : [Use g = 10 m/s2]

Multiple Choice Options

  • A 6.0 × 102 kg s−1
  • B 500 kg s−1
  • C 10 kg s−1
  • D 60 kg s−1

Step-by-Step Verified Solution

JEE Main 2021 (Online) 26th August Morning Shift Physics - Laws of Motion Question 74 English Explanation
Fthrust=(dmdt.Vrel)

(dmdtVrel−mg)=ma

⇒(dmdt)×500−103×10=103×20

dmdt = (60 kg /s)

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