tolong di jawab nomor 1 dan 3 yaa terimakasi

maaf saya hanya menjawab no. 3
jawab :
P1 = P2
F1/A1 = F2/A2
60/A1 = 40/5
A1 . 40 = 5 . 60
A1 . 40 = 300
A1 = 300/40 = 7,5 m persegi

tekanan thd lantai
P = F/A

F = Gaya(N) => m.a
A = Luas penampang

F = 50kg × 10 =500N
A = 0.4 × 0.2 = 0.08m²

P = 500N/0.08m² = 6250N/m²