Force equals Mass times Acceleration, or F = M x A
It is the input value to the function called "f(x)" If f(x)= x + 1, an input value of 2 ( x equals 2) would give us 2 + 1, or 3.
Yes. (Atleast that's what we're taught in Sweden)
Newton's second law.
1969 Man finally [first] landed on the Moon