1. Tardigrade
  2. Question
  3. Physics
  4. A bullet of mass 0.04 kg moving with a speed of 90 ms -1 enters a heavy wooden block and is stopped after a distance of 60 cm. The average resistive force exerted by the block on the bullet is

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. A bullet of mass $0.04\, kg$ moving with a speed of $90\, ms ^{-1}$ enters a heavy wooden block and is stopped after a distance of $60\, cm$. The average resistive force exerted by the block on the bullet is

Laws of Motion

Solution:

$a=\frac{-u^{2}}{2 s}=\frac{-90^{2} ms ^{-2}}{2(0.6)}=-6750\, ms ^{-2}$
$F=m a=(0.04 kg )\left(-6750 ms ^{2}\right)=-270\, N$
$-ve$ sign indicates retarding force.