A bullet leaves a rifle with a muzzle velocity of 400 m/s. While accelerating through the

barrel of the rifle, the bullet moves a distance of 0.840 m. Determine the acceleration of the

bullet.

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How much time was taken for the bullet to leave the rifle? ithout that, acceleration cannot be found

Answers

2015-06-07T11:49:35+05:30
The question states that 0.840 m is the distance travelled within the barrel. Therefore u = 0 m/s, v= 521 m/s. 
This means that a = (v^2 - u^2)/2s. 
This is a reformat of v^2 = u^2 + 2as 
a = (521^2)/(2 x 0.840) 
a = 161.57 m/s^2
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