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finding the net force of beam and beam acceleration

chrisbaileyis
in Homework Help

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A crane lifts a 225kg steel beam, applying a 2430N vertical force

 

Find the net force on the beam

 

Find the beam's acceleration

  • Quote

    To begin with, let's identify the forces on the beam.

     

    The force of gravity (the weight of the beam), is mg, or 225kg*9.8 m/s2=2205 Newtons downwards.

     

    The crane lifts the beam by applying a force of 2430N upwards.

     

    The net force, then, must be 2430N-2205N = 225N upwards

     

    The beam's acceleration can be found from Newton's 2nd Law, Fnet=ma, so a=Fnet/m=225N/225kg=1 m/s2 upwards.

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