Final answer:
The forces acting upward on a suspended object at rest must be equal to the forces acting downward to maintain the object in static equilibrium according to Newton's first law of motion.
Step-by-step explanation:
For a suspended object at rest, the forces acting upward must be equal to the forces acting downward. This is in accordance with Newton's first law of motion, which states that if an object is at rest and the net force acting on it is zero, then the object will remain at rest.
Therefore, the tension force pointing upward, which is equal to the gravitational force (weight of the object) pointing downward, maintains the object in a static equilibrium.\
To elaborate, the force of tension (Ft) can be calculated using Ft = mg, where 'm' is the mass of the object and 'g' is the acceleration due to gravity. If the object is not accelerating, then no additional force is necessary, meaning the upwards force exactly balances the downwards gravitational force.
For a suspended object at rest, the forces acting upward on the object must be equal to the forces acting downward. According to Newton's first law of motion, if the net force on an object is zero, the object will remain at rest or continue moving with a constant velocity. In this case, the force of tension in the string must exactly balance the force of gravity pulling the object downward.