1). Force = (mass) x (acceleration)
Force = (20 kg) x (0.5 m/s )
Force = 10 Newtons
2). Force = (mass) x (acceleration)
In this case, the acceleration is the acceleration of gravity.
1 N = (mass) x (9.8 m/s )
Mass = (1 N) / (9.8 m/s )
Mass = 0.1 kg
3). Force = (mass) x (acceleration)
This formula is important. Memorize it !
You saw here that the same formula answered both of your questions.
It'll answer a lot more Physics questions that you haven't seen yet.
If you're taking a Physics class, there will DEFINITELY be at least one question on the final exam that will test you to see whether you know this formula and how to use it. Maybe more than one.
