energi kinetik kelapa tersebut ketika menumbuk tanah adalah sebesar…
800 joule.
pembahasan :
m = 2 kg.
vₒ = 20 m/s
s = h = 20m
a = g = 10 m/s²
Rumus :
vₜ = vₒ + a.t
vₜ² = vₒ² + 2.a.s
Ek = ½mv²
= 20² + 2(10)(20)
= 400 + 400
= 800
= ½(2)(800)
= 800 joule
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energi kinetik kelapa tersebut ketika menumbuk tanah adalah sebesar…
800 joule.
pembahasan :
m = 2 kg.
vₒ = 20 m/s
s = h = 20m
a = g = 10 m/s²
Rumus :
vₜ = vₒ + a.t
vₜ² = vₒ² + 2.a.s
Ek = ½mv²
vₜ² = vₒ² + 2.a.s
= 20² + 2(10)(20)
= 400 + 400
= 800
Ek = ½mv²
= ½(2)(800)
= 800 joule