Question

Chang sees the following formula on a website about Newton’s second law. a = Sigma F over m.

What does the symbol F in the formula indicate that Chang needs to do?

(A)He needs to find the net force acting on the object in a direction.
(B)He needs to use only forces acting in the direction of motion.
(C)He needs to combine the horizontal and vertical forces.
(D)He needs to multiply the horizontal and vertical forces.

Answer 1

Answer:A) he needs to find the net force acting on an object in a direction.

Explanation:

Answer 2

Answer:

He needs to find the net force acting on the object in a direction.

Explanation:

The second law of motion gives the relationship between force, acceleration and mass of an object. Its mathematical expression is given  by :

$\Sigma F=m\Sigma a$

$\Sigma a=\dfrac{\Sigma F}{m}$        

F represents the net force acting on the object. So, Chang needs needs to find the net force acting on the object in a direction. Hence, the correct option is (a).