Question

What type of firearm was used What was the caliber of the bullet? How many bullets were fired? Where was the shooter standing? What was the angle of impact? Has this firearm been used in a previous crime?

Answer 1

The questions relate to various physics topics such as conservation of momentum, impulse, projectile motion, and force calculations. Formulas from physics are used to calculate velocity, time of flight, distances, and forces based on provided parameters and known physical laws.

Step-by-step explanation:

The questions given seem to relate to different physics concepts involving linear momentum, impulse, projectile motion, and force. Here is a summary of answers to the provided problems:

1. Magnitude and direction of the velocity of the block/bullet combination immediately after the impact can be calculated using the conservation of linear momentum, provided we have the masses and velocities before impact.
2. The magnitude and direction of the impulse by the block on the bullet can be found using the change in momentum of the bullet with the formula Δp = m(vf - vi).
3. The magnitude and direction of the impulse from the bullet on the block are equal in magnitude and opposite in direction to the impulse by the block on the bullet, according to Newton's third law of motion.
4. If a bullet's speed changes from 400 m/s to a final speed after a 3 ms impact, the average force can be determined using the impulse-momentum theorem: FΔt = Δp.
5. For a bullet shot horizontally at an initial speed of 200 m/s from 1.5 m high, the time before the bullet hits the ground can be found by calculating the time of free fall and the horizontal distance travelled can be calculated using horizontal motion formulas.
6. The average force exerted on a bullet to accelerate it and the bullet's muzzle velocity are found using the principles of kinematics and dynamics.