3) (ex) A boy pulls on a block of mass 5.0 kg along a horizontal frictionless floor. The boy pulls with a force of 15 N at an angle of 20 degrees above the horizontal. (a) List each force acting on the block (including the direct cause of the force). (b) Draw a FBD for the block. Determine (c) the acceleration and (d) the normal force acting on the block, caused by the floor. (Use good symbolic notation; show all your work.) (See PSL 5.8, but w/o friction.)
3) (ex) A boy pulls on a block of mass 5.0 kg along a horizontal frictionless floor. The boy pulls with a force of 15 N at an angle of 20 degrees above the horizontal. (a) List each force acting on the block (including the direct cause of the force). (b) Draw a FBD for the block. Determine (c) the acceleration and (d) the normal force acting on the block, caused by the floor. (Use good symbolic notation; show all your work.) (See PSL 5.8, but w/o friction.)
College Physics
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Chapter1: Units, Trigonometry. And Vectors
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Transcribed Image Text:3) (ex) A boy pulls on a block of mass 5.0 kg along a horizontal frictionless floor. The boy pulls with a
force of 15 N at an angle of 20 degrees above the horizontal. (a) List each force acting on the block
(including the direct cause of the force). (b) Draw a FBD for the block. Determine (c) the acceleration
and (d) the normal force acting on the block, caused by the floor. (Use good symbolic notation; show
all your work.) (See PSL 5.8, but w/o friction.)
Expert Solution
Step 1
a)
List of force acting on the block:
F cos20 along positive x direction.
Fsin30 along positive y direction.
Normal force along positive y direction.
Weight of block along negative y direction.
b)
Free body diagram:
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