Question

Identify which of the following is true about the object at rest.
A. The forces acting on an object are balanced.
B. The object has zero velocity.
C. The object has no acceleration.
D. All of the above.

Answer 1

Hint: The object which is at rest will be in the same state as long as another force acts on it Newton’s law is very much important in solving this. It states that each and every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. It is also called the law of inertia.

Complete step by step answer:
First of all let us get to know about Newton's law of motion. In the first law of motion, an object will not change its state of motion unless a force acts on it. And we also know that an object without velocity or zero velocity will not be having acceleration according to the relation between velocity and acceleration,
$a=\dfrac{v}{t}$
And also as a is zero then the resultant force acting on an object will be zero as per the relation,
$F=ma$
Resultant force zero means either there is no force acting on the object which is at rest or the force which is experiencing at the left side of the object will be balanced with the force acting on the right hand side. Therefore as per the options given, all the options are correct.
Hence, the correct answer is option D.

Note:
In Newton's second law, the force on an object is the same as its mass times its acceleration. And in the third law, it is said that, when two objects interact, they apply forces to each other of the same magnitude and opposite direction.