12. A toy car with a mass of 3 kilograms is moving along a path with its motion described by the following position function: r(t)=(4-4cos (21))i + (4sin(21))} Distance is measured in meters and time in seconds. Find the force of friction necessary to keep the car on the path described by the position function whent=2 seconds.

Calculus: Early Transcendentals
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Author:James Stewart
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Chapter1: Functions And Models
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Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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12. A toy car with a mass of 3 kilograms is moving along a path with its motion
described by the following position function:
r(1)=(4-4cos (21))i + (4sin(2t));
Distance is measured in meters and time in seconds. Find the force of friction
necessary to keep the car on the path described by the position function when t=2
seconds.
Transcribed Image Text:12. A toy car with a mass of 3 kilograms is moving along a path with its motion described by the following position function: r(1)=(4-4cos (21))i + (4sin(2t)); Distance is measured in meters and time in seconds. Find the force of friction necessary to keep the car on the path described by the position function when t=2 seconds.
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