Consider a plane flying due West at 200 MPH. The co-pilot is firing a gun in the opposite direction the plane is flying - due East. If the co-pilot clocks the bullets at 500 MPH, how fast would the bullets be clocked from the ground?

300 MPH East

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700 MPH East

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500 MPH West

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200 MPH West

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cannot determine with information provided

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Solution

The correct option is B 300 MPH East
The bullet and the plane fly in the opposite directions.
Velocity of plane w.r.t ground $V_{p} = 200$ MPH (due West)
Velocity of bullet w.r.t plane $V_{b p} = 500$ MPH (due East)
Thus velocity of bullet w.r.t ground $V_{b} = V_{b p} - V_{p} = 500 - 200 = 300$ MPH (due East)

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Consider a plane flying due West at 200 MPH. The co-pilot is firing a gun in the opposite direction the plane is flying - due East. If the co-pilot clocks the bullets at 500 MPH, how fast would the bullets be clocked from the ground?

The correct option is B 300 MPH EastThe bullet and the plane fly in the opposite directions.Velocity of plane w.r.t ground Vp=200 MPH (due West)Velocity of bullet w.r.t plane Vbp=500 MPH (due East)Thus velocity of bullet w.r.t ground Vb=Vbp−Vp=500−200=300 MPH (due East)