Ta có :
a) Trái Đất : \(\text{P}_{\text{TĐ}}=\text{mg}_{\text{TĐ}}=75\cdot9,8=735\text{N}\)
b) Mặt Trăng : \(\text{P}_{\text{MT}}=\text{mg}_{\text{MT}}=75\cdot1,7=127,5\text{N}\)
c) Sao Kim : \(\text{P}_{\text{SK} }=\text{mg}_{\text{SK}}=75\cdot8,7=652,5\text{N}\)