Respuesta :
Answer
given,
F₁ is horizontal = 40 N
F₂ is normal = 20 N
F₃ is parallel = 30 N
work done by
W₂ = 0 as force is acting perpendicular to the direction of motion.
as the motion moved to 0.8 cm
W₃ = F₃ x d
W₃ = 30 x 0.8
W₃ = 24 J
W₁ = F₁ x d
W₁ = F₁ cos ∅ x d
W₁ = 40 cos 30⁰ x 0.8
W₁ = 27.21 J
Answer:
The work done by the forces on the block [tex]W_{1} =27.21J[/tex]
[tex]$\mathrm{WF}_{2} =8J$[/tex]
[tex]$\mathrm{WF}_3} =24J$[/tex]
Explanation:
Given,
[tex]$F_{1}$[/tex]is horizontal [tex]$=40 \mathrm{~N}$[/tex]
[tex]$\mathrm{F}_{2}$[/tex] is normal [tex]$=20 \mathrm{~N}$[/tex]
[tex]$\mathrm{F}_{3}$[/tex] is parallel [tex]$=30 \mathrm{~N}$[/tex]
The motion moved to [tex]$0.8 \mathrm{~cm}$[/tex]
[tex]$W_{1}=F_{1} \times d$[/tex]
[tex]$W_{1}=F_{1} \cos \emptyset \times d$[/tex]
[tex]$W_{1}=40 \cos 30^{\circ} \times 0.8$[/tex]
[tex]$W_{1}=27.21 \mathrm{~J}$[/tex]
[tex]$\mathrm{WF}_{2} =20(\sin 30)(0.8)=8J$[/tex]
[tex]$\mathrm{WF}_{3} =30(0.8)=24J$[/tex]
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