Uniform Circular Motion https www youtube comwatch vKv
Uniform Circular Motion https: //www. youtube. com/watch? v=Kv. Cezk 9 DJfk
What is a circle? In geometry: the set of all points in a plane that are at a given distance from a given point.
What is a circle? In physics: All points whose position vector has the same beginning and the same length
Radial Position Vectors p p
Uniform Circular Motion –Constant speed –But not constant velocity –The velocity is always changing direction
Uniform Circular Motion Velocity vector is perpendicular to position vector. It’s a tangent. v p
Uniform Circular Motion Ø Period - the time it takes to go around the circle once Ø Symbol - T
Uniform Circular Motion Acceleration vector is perpendicular to velocity vector and pointed to center of circle. v ac centripetal acceleration (ac) “center seeking”
Uniform Circular Motion Use geometry’s similar triangles: ac = 2 v /r ac = centripetal acceleration (m/s 2) v = velocity (m/s) r = radius of circle (m)
Uniform Circular Motion centripetal force Fc = mac= mv 2/r Fc = centripetal force (N) m = mass of object (kg) ac = centripetal acceleration (m/s 2
Uniform Circular Motion v centripetal force Fc = mac https: //www. youtube. com/watch? v=DLgy 6 r. VV-08 Fc
Example A 1. 6 kg object travelling in a circle has a centripetal acceleration of 9. 0 m/s 2. What is the centripetal force acting on the object? Given Unknown Equation Substitute Solve
A 500 kg race car rounds a curve of 10 m with a speed of 35 m/s. What is the magnitude of the centripetal force acting on the car? Given Unknown Equation Substitute Solve
Demestrius is riding a roller coaster at Six Flags and feels a centripetal force of 1700 N when going around a sharp curve. If his mass is 80 kg, what is his centripetal acceleration? Given Unknown Equation Substitute Solve
Dillen, with a weight of 580 N, has a centripetal acceleration of 3 m/s 2 as he rounds a bend in a cross country match. What is the magnitude of the centripetal force acting on Dillen? Given Unknown Equation Substitute Solve
Work Your Turn Problems https: //www. youtube. com/watch? v=ID 0 R 43 My 4 Co&index=8&list=PLZHDrmpjw 4 My 79 MFX 9 az. RSk. G 9 h. XTP 2 FNJ
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