very short exercise for usaha

Which one of the following rumus is for Ek? (Energi kinetik)

• Ek = 1/2 . m . v^2

• Ek = m . g . y

• Ek = Em1

• Ek = 1/2 . m . y

Energi awal = Energi akhir

• True

• False

Ek0 + Epg0 = Ek1 + Epg1

0 = awal
1 = akhir

• True

• False

(Cos 37 = 4/5)

W = ?

• 860 J

• 960 J

• 840 J

• 940 J

Type in the rumus for Epg (Energi potensial gravitasi) don't use any space

e.g: a.b.c

• 160 J

• 180 J

• 240 J

• 320 J

• 10

• 25 m

• 50 m

• 20