Jack and John pull on a box with a mass M = 54 kg. The box accelerates to the left. - is the acceleration equal, bigger, or smaller than zero? -is the netF equal, bigger, or smaller than zero? - is F2 equal, bigger, or smaller than zero?

Two objects inside an evacuated container, one with a mass three times the other one, are dropped from the same height. If they are dropped at the same time, which of the following is true? a) The acceleration of the heavier object is three times greater than that of the lighter object. b) The acceleration of the lighter object is three times less than that of the heavier object. c) They will both hit the ground with the same speed. d) Anything falling in vacuum experiences no friction and thus has constant velocity. e) The force of gravity is the same for both objects.

Consider an object dropped from an airplane, subject to both gravity and air resistance. Which of the following statements is necessarily true a few seconds after the object is dropped? a) Magnitude of the object's acceleration is greater than 9.8 m/s². b) Magnitude of the object's acceleration is 9.8 m/s². c) Magnitude of the object's acceleration is less than 9.8 m/s?. d) Magnitude of the object's acceleration is 9.8 m/s² only when it has reached terminal velocity. e) More information is needed.

Calculate the acceleration due to gravity and the deviation for each height.  The chart below shows four different times(s) an object hits the ground from four different heights(in). Kitchen Table Height= 30.5in Counter Top Height= 38in Sewing Table Height= 20in  Chair Height = 17in 0.415 seconds (s) 0.484s 0.335s 0.308s 0.408s 0.684s 0.310s 0.303s 0.424s 0.634s 0.368s 0.310s 0.395s 0.505s 0.362s 0.305s