State the Newton's second law of motion in words and in mathematical form. If a net external
force acts upon a particle, what is the ratio of the force to acceleration?
What is Newton's second law also called?
A truck of 2 000 kg mass moving at a velocity of 12 m s-1 slide 15 m before it comes to a stop
after applying the brakes. Find the resisting forces of the brakes.
(8-Marks)

Is a  vector quantity  that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.

We can infer that star y is closer but other factors must be considered include the heat of the star, the mass, and the brightness of the star. even though star x seems dimmer it may just be less bright or contains less heat.