Answered

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A bullet is fired with a speed of 720 m/s.

a.What time is required for the bullet to strike a target at a position +324 m?

b.What is the velocity in km/h?

Sagot :

quasarJose

Answer:

0.9s

2592km/hr

Explanation:

Given parameters:

Final velocity of the bullet  = 720m/s

Distance covered  = 324m

Unknown:

Time for the bullet to strike a target = ?

Velocity in km/h

Solution:

To solve this problem, we use the kinematics equation shown below:

     S  =( [tex]\frac{v + u}{2}[/tex]) t

So;

        324  = [tex]\frac{720 + 0}{2}[/tex]  t

        324  = 360t

           t  = 0.9s

B. to convert this velocity to km/hr

       1000m  = 1km

       3600s  = 1hr

  720 x m x [tex]\frac{1}{s}[/tex]  x [tex]\frac{1km}{1000m}[/tex]  x [tex]\frac{3600s}{1hr}[/tex]    = 2592km/hr

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