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3 years ago

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Car A passes Car B on the highway. Relative to Car A's movement, Car B is moving at a rate of 9 mph backward. If the speed of Ca

r A is 68 mph, what is the speed of Car B?

1 answer:

anyanavicka [17]3 years ago

3 0

This should tell u everything Physics Homework Help: Speed, Velocity, Acceleration - Physics 24/7

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The velocity of a 48.0 g shell leaving a 2.95 kg rifle is 391. m/s. What is the recoil velocity of the rifle?

Monica [59]

Hi there!

$\large\boxed{ -6.36m/s}$

Use the equation:

$v_{2} = -\frac{m_{1}}{m_{2}} v_{1}$

Where m2 and v2 deal with the larger object, and m1 and v1 with the smaller object. Plug in the given values:

v2 = ?

m1 = 0.048 kg (converted)

m2 = 2.95

v1 = 391

$v_{2} = -\frac{0.048}{2.95} *391$

$v_{2} = -6.36m/s$

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Answer:

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Explanation:

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