The 4 th Practice Problem : A kind-hearted Kinesiology student is traveling over

Question

The 4th Practice Problem: A kind-hearted Kinesiology student is traveling over the river and through the woods to deliver warm turkey dinners to some shut-ins during some holiday time. She has 3 pre-packaged turkey dinners each having a mass of 4.0 lg. She begins dragging them over the “Happy Earth†non-frictional snow with a force of 2.0 N. A kindly physics professor has supplied her with some Acme massless and non-extensible string so she can pull the dinners along the snow with one trailing behind another. Draw the physical situation, determine the acceleration of the system, and find the tensions in the strings between the turkey dinners. The tension between the student and the 1st of the turkey dinners should be self-evident.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

Explanation / Answer

treat them as one large mass

2 =3*4*a

a = 1/6

first turkey

2 - T1 = 4a

T1 = 2-4/6 = 8/6

second turkey

8/6 - T2 = 4a

T2 = 8/6 - 4/6 = 4/6

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