Question

A 55-kg packing crate is pulled with constant speed across a rough floor with a rope that is at an angle of 41.0 ∘ above the horizontal.

If the tension in the rope is 175 N , how much work is done on the crate by the rope to move it 9.0 m ?

Answer #1

_{fric} . As the object is
not accelerating the horizontal component of the force F remains
constant and equal to the friction. AS the other forces are
perpendicular to the displacement x = 9m, they have no effect in
work . Hence the work done on the crate is work done against
friction. It is given by,

A
55-kg packing crate is pulled with constant speed across a rough
floor with a rope that is at an angle of 41.6 degrees above the
horizontal.
Part a:
If the tension in the rope is 165 N how much work is done on
the crate by the rope to move it 3.0 m ?
___ J

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