Newtons 1st and 2nd

Question 1

Newton 1st law says

Answer 1

Resultant force is needed to make something, start moving, speed up, or slow down

Question 2

1st law

Answer 2

“If no resultant force acts, an object will remain stationary or move with a constant speed in a straight line.”

Question 3

Circular motion and 1st law

Answer 3

if object is travelling in circular orbit, it is constantly changing direction, so it is changing velocity, and is accelerating.
1st law states there should be a resultant force acting on it, this keeps it in the middle, this is called centripetal force.

Question 4

acceleration is proportional to resultant

Answer 4

acceleration is proportional to resultant force.

larger resultant force, more object accelerates.

Question 5

acceleration is inverse proportional to mass

Answer 5

object with large mass will accelerate less .

Question 6

2nd law

Answer 6

f(resultant force N)=m (mass kg) X a (acceleration m/s)