Which of these provides the best evidence for Newton’s First Law of Motion? A
While sitting in a chair, you exert force on the chair, and the chair exerts the same amount of force back on you.

B
A basketball sitting on the basketball court doesn’t move until something pushes it.

C
You push a full shopping cart and an empty shopping cart. The empty shopping cart goes much faster than the full one.

D
You push your little brother on the swings, and he goes higher the harder you push him.

I would say A because Newton Law of motion is you pushing force and the object pushing force back on you

a=d/t

a="triangle"v/t

explanation:

a = acceleration

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.