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Ek = 1/2 mv²
Vx = V cos α = 40 cos 60 = 40.1/2 = 20 m/s
Vy = 0 (pd titik tertinggi)
V = √Vx²+Vy²
= √20² + 0
= 20 m/s
Ek = 1/2. 0,02, 20²
= 4 J
silahkan di re-check sebelum menjadi jawaban akhir
semoga membantu