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midey
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Homework Statement
An 8 kg bullet is fired into a stationary 9 kg block of wood which is free to move. The bullet is stopped in the wood which has a velocity of 40 cm/s after the impact. What was the speed of the bullet?
To solve for the speed of an 8kg bullet, you can use the formula v = √(2KE/m), where v is the speed, KE is the kinetic energy, and m is the mass of the bullet. You will also need to know the value of the kinetic energy, which can be calculated by multiplying the mass of the bullet by the square of its velocity.
The speed of a bullet is typically measured in meters per second (m/s) or feet per second (ft/s). These units represent the distance the bullet travels in one second.
No, to solve for the speed of an 8kg bullet, you will also need to know its kinetic energy or velocity. Without this information, it is not possible to accurately determine the speed of the bullet.
The formula v = √(2KE/m) is a simplified version that does not take into account factors such as air resistance and drag. Therefore, it may not be 100% accurate in real-world scenarios. However, it is a good approximation for calculating the speed of a bullet in a controlled environment.
Yes, there are other methods for determining the speed of a bullet, such as using high-speed cameras or measuring the distance the bullet travels in a given time. However, these methods may require more advanced equipment and may not be as accurate as using the formula v = √(2KE/m).