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F = 40 N
v0 = 6 m/s
vt = 2 m/s
t = 10 s
g = 9,8 m/s²
Dit:
w = ...... N
Jawab:
vt = v0 + at
2 = 6 + a 10
2 - 6 = 10a
- 4 = 10a
a = -4/10
a = - 0,4 m/s² (diperlambat)
F = ma
40 = m . 0,4
m = 40 / 0,4
m = 100 kg
w = mg
w = 100 . 9,8
w = 980 N