ƩF= m.aT-W=m.a70-50=5a20=5a4m/=a
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F = m.g
= 5 kg . 10 m/s²
= 50 N
*** Gaya ke atas
F = T (Tegangan tali)
= 70 N
Total Gaya = gaya ke atas - gaya ke bawah
= 70 N - 50 N
= 20 N
*** Fakhir = m.a
20 N = 5 kg . a
4 m/s² = a
Smoga mmbntu... :)
dit: a= ?
jwb : tentukan arah percepatan, berarti krn ditarik maka a nya keatas, semua gaya yg berlawanan dg arah a maka bernilai negatif
ƩF= m.a
T-W=m.a
70-50=5a
20=5a
4m/=a