Question

Determine the force exerted by the cable at ðµðµ and the reaction at support ð´ð´ for the bar shown. You may assume the bar is massless for the analysis. Write your answers using 3 significant digits.

1) 500 N
2) 900 N

Answer 1

The query relates to finding the tension in a cable and the reaction force at a support point for a static bar, applying Newton's second law where the tension equals the weight of a stationary mass thereby maintaining equilibrium. The correct multiple-choice option is none of these.

Step-by-step explanation:

The question involves finding the tension in a cable and reaction at a support for a bar, which falls within the subject of physics, specifically dealing with statics and dynamics. To solve these problems, we apply Newton's second law and equilibrium conditions. When a mass is stationary, the net force acting on it is zero (Fnet = 0). This means that the tension T in the rope supporting the mass must equal the gravitational weight w of the mass.

For example, if the mass is 5.00 kg, the weight w acting downwards is given by w = mg, where g is the acceleration due to gravity (approximately 9.81 m/s²). Hence, the tension T in the cable is required to be equal and opposite to the weight to maintain equilibrium.

In a problem involving a horizontally pushed block, one must consider both the applied force and the force of friction to determine the acceleration using Newton's second law. By summing the forces in the horizontal direction and dividing by the mass, you can solve for the acceleration. The correct multiple-choice option is none of these.