An upward applied force of 10 lbf is applied to a body that has been dropped....

An upward applied force of 10 lbf is applied to a body that has been dropped. Assume the usual value for acceleration due to gravity. If the object weighs 40 lbm, what is the vertical acceleration of the object in ft/s2 ? Draw a free body diagram and label your axes. ANSWER should be between ( 20-25 ft/s2)

Expert Solution

Answer : the acceleration of the body is virtically downward.

Solution:

As the body is dropped ,
Hence ,
Which is directed along axis i.e downword.
Again, according to Newton's 2nd laws of motion ,
   , where acceleration of the body
Hence,
Now,

Hence,


Putting this ,



Hence, the acceleration of the body is virtically downward.

genius_generous answered 2 years ago

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