Agirl sits on a tire swing and is pushed in a circular motion by her father. her tangential speed is 2.8 m/s and the girl travels in a circle with a diameter of 4.0 m. what is the girl's centripetal acceleration?

Both speed and velocity measure how fast something is moving. however, since speed is not a it does not require a(n question 6 options: a) quantity , unit b) magnitude, unit c) scalar, direction d) vector, direction