Post a New Question

Math Calc

posted by on .

An object is moving along a circle of radius 5 . When the object is at the point (−4,3) , the y value of its position is changing at the rate of 9 units per second. How fast is the x value of its position changing at that moment?

  • Math Calc - ,

    x^2 + y^2 = 25
    2x dx/dt + 2y dy/dt = 0

    2(-4) dx/dt + 2(3)(9) = 0
    -8 dx/dt + 54 = 0
    dx/dt = 54/8 = 27/4 = 6.75

    makes sense; the particle is moving up to the right.

Answer This Question

First Name:
School Subject:
Answer:

Related Questions

More Related Questions

Post a New Question