How long does it take a bullet to accelerate from rest to aspeed of 343 m/s if the blast from the gun can acceleratethe bullet at a rate of 1.25 × 105 m/s2?

To solve this problem, we can use the formula for acceleration, which is:

Acceleration = Change in Velocity / Time

We need to solve for Time, so we rearrange the formula to:

Time = Change in Velocity / Acceleration

The change in velocity is the final speed of the bullet minus its initial speed. Since the bullet starts from rest, its initial speed is 0 m/s. So, the change in velocity is 343 m/s.

The acceleration is given as 1.25 × 10^5 m/s^2.

Substituting these values into the formula gives:

Time = 343 m/s / 1.25 × 10^5 m/s^2 = 0.002744 seconds

So, it takes approximately 0.002744 seconds for the bullet to accelerate from rest to a speed of 343 m/s.