Peabody /ËpiËbÉdi/ is a city in Essex County, Massachusetts, United States. At the 2010 census, the population was 51,251, and in 2014 the estimated population was 52,376. Peabody is located in the North Shore region of Massachusetts. 1 History.
Acceleration is a vector because it has a magnitude and a direction (Accelerating at a rate of 5 Miles Per Hour North). Speed is a scalar because it only has a magnitude (35 Miles Per Hour) . Velocity is the derivative of the acceleration and is also a vector (35 miles per hour North). Adam Â· 5 years ago. Thumbs up.
The acceleration, in the frame you defined, is opposite to the positive direction. Do the same problem in both frames of reference. Object is thrown upward with initial speed V0 (notice that I said speed and not velocity: speed is a scalar and velocity is a vector) Case1. Frame of reference: positive direction UP Then the acceleration is negative and the initial velocity is positive. Equation of motion: d = V0t - (1/2)gt^2 Case 2.