A 16.0 g bullet is moving to the right with speed 250 m/s when it hits a target and travels an additional 22.6 cm into the target. What are the magnitude (in N) and direction of the stopping force acting on the bullet

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Answer:

The magnitude will be "2212 N".

Explanation:

The given values are:

Initial speed, u = 250 m/s

Final speed, v = 0

Mass, m = 16.0 = 0.016 kg

Distance, d = 22.6 cm

On converting cm into m, we get

d = 0.226 m

As we know,

⇒  [tex]v^2-u^2=-2ad[/tex]

⇒  [tex]a=\frac{v^2-u^2}{-2d}[/tex]

On putting the estimated values, we get

⇒    [tex]=\frac{(0)^2-(250)^2}{-2\times 0.226}[/tex]

⇒    [tex]=\frac{0-62500}{-0.452}[/tex]

⇒    [tex]=13,8276 \ m/s^2[/tex]

Now,

Force, [tex]F=ma[/tex]

On putting values, we get

⇒            [tex]=0.016\times 138276[/tex]

⇒            [tex]=2212 \ N[/tex] (magnitude)

The magnitude of the stopping force on the bullet is 2,212.4 N in opposite direction to the bullet.

The given parameters;

  • mass of the bullet, m = 16 g
  • speed of the bullet, u = 250 m/s
  • distance traveled by the bullet and the target, d = 22.6 cm = 0.226 m

The acceleration of the bullet is calculated as follows;

v² = u² - 2ad

where;

  • v is the final velocity when the bullet stops = 0

0 = 250² - a(2 x 0.226)

0.452a = 62500

[tex]a = \frac{62500}{0.452} \\\\a = 138,274.34 \ m/s^2\\\\[/tex]

The magnitude of the stopping force on the bullet is calculated as follows;

F = ma

F = 0.016 x 138,274.34

F = 2,212.4 N

Thus, the magnitude of the stopping force on the bullet is 2,212.4 N in opposite direction to the bullet.

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