please bantu,yg bisa langsungvfolow + terimaksih

8) jawab,Ek=½m.v²
=½ × 50.000 kg × (100m/s)²
=½ × 50.000 kg × 10.000 m²/s²
=25.000 × 10.000 Joule
=25 × 10^7 joule

9) jawab,h=Ep/m.g
=1.500/1,5×10 m
=1.500/15 m
=100 m
=1.000 dm

10) jawab, F=½W
W=m.g
=2.10 N
=20 N
F=½ x 20 N
=10 N

semoga benar ya