Seorang anak bersepeda sepanjang jalan di kompleks perumahan. 10 detik pertama menempuh jarak 20 m, 10 detik berikutnya menempuh jarak 30m, 5 detik berikut berhenti, 15 detik berikut menempuh jarak 40 m. hitunglah kelajuan rata rata si anak bersepeda!
SFX1
Kelajuan = jarak per waktu = m/s (20m+30m+40m)/(10s+10s+5s+15s) 90m/40s = 9m/4s = 2,25m/s GOOD LUCK -SFX-
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Ssyamsudin
Diket : t1 = 10 s ..... s1 = 20 m t2 = 10 s...... s2 = 30 m t3 = 5 s......... s3 = 0 m t4 = 15 s ...... s4 = 40 m
v = delta s / delta t = s1 + s2 + s3 + s4 / t1 + t2 + t3 + t4 = 20 +30 + 0 +40 / 10 +10+5+15 = 90 / 40 = 2,25 m/s
(20m+30m+40m)/(10s+10s+5s+15s)
90m/40s = 9m/4s = 2,25m/s
GOOD LUCK
-SFX-
t1 = 10 s ..... s1 = 20 m
t2 = 10 s...... s2 = 30 m
t3 = 5 s......... s3 = 0 m
t4 = 15 s ...... s4 = 40 m
v = delta s / delta t
= s1 + s2 + s3 + s4 / t1 + t2 + t3 + t4
= 20 +30 + 0 +40 / 10 +10+5+15
= 90 / 40 = 2,25 m/s