Muzzle velocity of a gun
A student decides to measure the muzzle velocity of a pellet shot from his gun. He points the gun horizontal. He places a target on a vertical wall a distance 3.00 m away from the gun. The pellet hits the target a vertical distance 0.210 m below the gun. What is the initial speed of the pellet?
Answer
This is simply looking at the position kinematic equation for the two different components of the velocity. You know the following is definitely true, which you'll need to find the initial speed of the pellet:
1. Gravity will affect the y component only, therefore the x-velocity will be constant.
2. Y component will not have an initial velocity since the gun will be shot horizontally.
3. The vertical distance will help you obtain the time it took for the gun to get from the gun to the target.
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This is simply looking at the position kinematic equation for the two different components of the velocity. You know the following is definitely true, which you'll need to find the initial speed of the pellet:
1. Gravity will affect the y component only, therefore the x-velocity will be constant.
2. Y component will not have an initial velocity since the gun will be shot horizontally.
3. The vertical distance will help you obtain the time it took for the gun to get from the gun to the target.