kym02 2 years ago I'm doing this physics experiment tomorrow and i need help! The aim is to find the resultant of two forces....can anyone please give me a theory, discussion and conclusion for this lab??? i don't fully understand it:(

1. JamesJ

Forces add up. That's what this lab is about. I am sitting in a chair right now, with no acceleration. By Newton's 1st law, this means that I must have zero net force acting on me. But there's gravity. I exert a force of gravity on the chair under me. By Newton's 3rd law, the chair exerts an equal and opposite force on me. These two forces add up. The net force I experience is zero. Here's another example: a plane, is headed in the north direction. The thrust from the engines is a force in the north direction. Air resistance is a force in the south direction. Let's suppose there is a wind blowing as well from the east. This exerts a force on the plane in the west direction. The net force on the plane is the sum of these three forces and is in the north-west direction roughly.

2. kym02

thank you! by the way how should i start the discussion??

3. JamesJ

For that, consult your teacher, textbook or class mates, sorry.

4. kym02

ok my teacher doesn't help his students so i'll just ask my classmates or probably google books! thanks anyways=)