Part D is what I need help with please. Part D is what I need help with please.

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Part D is what I need help with please. Part D is what I need help with please. Verizon LTE 10:25 PM session. masteringphysics.com C PSS 6.1 Ciroular dynamics problems Learning Goal: To practice Problem-Solving Strategy 6.1 Circular dynamics problems A 1500-kg car drives at 30 m/s around a flat circular track 300 m in diameter. What are the magnitude and direction of the net force on the car? PROBLEM-SOLVING STRATEGY 6.1 Circular dynamics problems Circular motion involves an acceleration and thus a net force. We can therefore use techniques very similar to those we've already seen for other Neton's second-law problems PREPARE Begin your visual overview with a pictorial representation in which you sketch the motion, define symbols, define axes, and identify what the problem is trying to find. There are two common situations: . If the motion is in a horizontal plane, like a tabletop, draw the free-body diagram with the circle viewed edge-on, the r-axis pointing toward the center of the circle, and the y- axis perpendicular to the plane of the circle. . If the motion is in a vertical plane, like a Ferris wheel, draw the free-body diagram with the circle viewed face-on, the r-axis pointing toward the center of the circle, and the y- axis tangent to the circle. SOLVE Newton's second law for uniform circular motion, Ft(mu /r, toward center of circle), is a vector equation. Some forces act in the plane of the circle, some act perpendicular to the circle, and some may have componentsin both directions. In the coordinate system described above, with the r-axis pointing toward the center of the circle, Newton's second law is That is, the net force toward the center of the circle has magnitude m /r, whille the net force perpendicular to the circle is zero. The components of the forces are found directly from the free-body diagram. Depending on the problem, do one of the following . Use the net force to determine the speed e, then use circular kinematics to find frequencies or other details of the motion. Use circular kinematics to determine the speed v, then solve for unknown forces. ASSESS Make sure your net force points toward the center of the circle. Check that your result has the correct units, is reasonable, and answers the question. Prepare Construct a free-body diagram and identify the variables that are given or need to be found. Part A Sort the following forces as acting on the car or not.

Explanation / Answer

Given: radius (r)= 150m
mass = 1500kg
v = 30m/s
The magnitude of the net force :
Fnet = Fc ( centripetal force)

--> Fc = m * v^2/R
= 1500 * 30^2/150
= 9000 N
the net force is toward the center of circle

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