Q119 / 160 · JIPMER 2012 · Physics

The engine of a jet aircraft applies a thrown force of $10^5 \mathrm{~N}$ during take off and causes the plane to attain a velocity of $1 \mathrm{~km} / \mathrm{s}$ in 10 s . The mass of the plane is

  • A
    $10^2 \mathrm{~kg}$
  • Correct answer
    B
    $10^3 \mathrm{~kg}$
  • C
    $10^4 \mathrm{~kg}$
  • D
    $10^5 \mathrm{~kg}$

Solution

Acceleration produced in jet $=\frac{\text { Change in velocity }}{\text { Time }}$ $a=\frac{\left(10^3-0\right)}{10}$ $\therefore$ Mass $=\frac{\text { Force }}{\text { Acceleration }}=\frac{10^5}{10^2}$ $=10^3 \mathrm{~kg}$

Hence, the correct answer is option: 'B'.

Relevant Questions