Can an object be in mechanical equilibrium when only a single force acts on it? explain. 1. no; even one force is too much. there should be no forces acting on an object. 2. no; at least one other force is needed to cancel the action of the first force. 3. yes; a single force is necessary to keep the object in mechanical equilibrium. 4. yes; the object will act back with an equal and opposite force.

Option 2

Explanation:

For an object to be in mechanical equilibrium it is necessary that the sum total of all the forces acting on that forces must be zero.

If we consider an example of the object in free fall as in case of an object falling from space, in that case, the only force acting on the object is due to the gravitation force of the earthy on that object without any external forces acting on it.

Thus in this case the sum total of all the forces will not be zero and the particle is in accelerating motion under gravity.

Thus for an object to be in mechanical equilibrium, it is necessary that another force must be present to counter balance it.

PLEASE HELP

Two blocks are arranged as shown below and released from rest. The blocks have masses, m1 = 1.50 kg and 2 = 1.25 kg. The coefficient of kinetic friction between block 1 and the table is 0.211.

(A)What is the acceleration of the blocks?

(B)What is the tension in the string?

(C )Although you are not required to do so, you should be able to continue this problem to find the time required for 2 to reach the floor and the velocity of the system just before reaching the floor. What additional information would you need to find these two quantities? The problem solution will include the calculation of the set quantities so you can check to see if you are correct.