A Particle of Unknown Mass Has a Momentum of 73

question 20

Multiple Choice

A particle of unknown mass has a momentum of 73 kg · m/s.At a time 7.3 s later,the momentum of the particle is 38 kg · m/s.What is the magnitude of the force acting on the particle during the interval,assuming the motion is in a straight line?

• A)It cannot be determined because the mass of the particle is not given.
• B)4.8 N
• C)10 N
• D)5.3 N
• E)9.4 N

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