Two Dogs,Rover and Fido,run on a Level Frictionless Surface

question 57

Multiple Choice

Two dogs,Rover and Fido,run on a level frictionless surface.Rover runs eastward with a momentum of 24 kg .m/s,and Fido runs northward with momentum 10 kg .m/s.They make a sudden perfectly inelastic collision.What is the magnitude of their combined momentum after the collision?

• A)14 kg .m/s
• B)26 kg .m/s
• C)34 kg .m/s
• D)It cannot be determined without knowing the masses and velocities of the dogs.

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