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a box of a mass 2 . 2 kg moves along the x axis on a frictionless floor. it is being pushed by a force

a box of a mass 2.2kg moves along the x axis on a frictionless floor. it is being pushed by a force F at the angle theta =22. below horizon (see figure) The postion of the bo x at time t is guven as x=42t^4+4.4t^2, where t is in s and x in m part (a ) what is the acceleration of the box at t=.15s part (b) what is the magnitude of the pushing force t=.15s

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