1. Tardigrade
  2. Question
  3. Physics
  4. A bullet is fired from gun. The force on the bullet is given by F=600 -2× 105 t, where F is in neutron and t in second. The force on the bullet becomes zero as soon as it leaves the barrel. What is the average impulse imparted to the bullet?

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Q. A bullet is fired from gun. The force on the bullet is given by $ F=600\,-2\times {{10}^{5}}\,t, $ where F is in neutron and t in second. The force on the bullet becomes zero as soon as it leaves the barrel. What is the average impulse imparted to the bullet?

VMMC MedicalVMMC Medical 2003

Solution:

The force is given by $ F=600-2\times {{10}^{5}}t=0 $ So, time for which force acts is $ t=\frac{600}{2\times {{10}^{5}}} $ $ =3\times {{10}^{-3}}\sec $ $ \therefore $ Average impulse $ \text{= force }\!\!\times\!\!\text{ time} $ $ =(600-2\times {{10}^{5}}\times 3\times {{10}^{-3}}) $ $ =0 $