.Σ fz - m az Example F2 Two forces, Fl and F2, act on a 5-kg mass. If Fl =20 N and F2 =15 N, find the acceleration in (a) and (b) of the Figure F1 Solution (a) (a) EF= F1 + F2 = (20i+ 15) N EF= ma :.20i+ 15j3D5 a a = (4i+ 3) m/s2 or a 5m/s2 (b) F2x = 15 cos 60 = 7.5 N F2y = 15 sin 60 = 13 N F2 = (7.5i+ 13)N EF= FI + F2 = (27.5i+ 13) = ma= 5 a a=(5.5i+2.6) m/s2 or a= 6.08m/s2 F2 60 F1 (b)

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter2: Equations And Inequalities
Section2.7: More On Inequalities
Problem 44E
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.Σ fz = m az
Example
F2
Two forces, Fl and F2, act on a 5-kg mass. If Fl =20 N
and F2 =15 N,
find the acceleration in (a) and (b) of the Figure
F1
Solution
(а
(a) EF= F1 + F2 = (20i+ 15) N
EF= ma .20i+ 15j3 5 a
a = (4i+ 3) m/s2 or a 5m/s2
(b) F2x = 15 cos 60 = 7.5 N
F2y = 15 sin 60 = 13 N
F2 = (7.5i+ 13) N
EF= F1 + F2 = (27.5i+ 13) = ma = 5 a
a=(5.5i+2.6j) m/s2 or a= 6.08m/s2
F2
60
F1
(b)
Transcribed Image Text:.Σ fz = m az Example F2 Two forces, Fl and F2, act on a 5-kg mass. If Fl =20 N and F2 =15 N, find the acceleration in (a) and (b) of the Figure F1 Solution (а (a) EF= F1 + F2 = (20i+ 15) N EF= ma .20i+ 15j3 5 a a = (4i+ 3) m/s2 or a 5m/s2 (b) F2x = 15 cos 60 = 7.5 N F2y = 15 sin 60 = 13 N F2 = (7.5i+ 13) N EF= F1 + F2 = (27.5i+ 13) = ma = 5 a a=(5.5i+2.6j) m/s2 or a= 6.08m/s2 F2 60 F1 (b)
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