In the figure below, the bar is 2.4 meters long and has a mass of 145 kg. To the nearest newton what is the tension in the wire?
To calculate the tension in the wire, we can use the principles of equilibrium. In this case, the sum of all the forces acting on the bar must be equal to zero, since the bar is not accelerating.
First, let's identify the forces acting on the bar. There are two forces: the weight of the bar and the tension in the wire. The weight of the bar can be calculated using the equation: weight = mass * gravitational acceleration.
The gravitational acceleration on Earth is approximately 9.8 m/s^2.
weight = 145 kg * 9.8 m/s^2 = 1421 N
Similarly, the tension in the wire is equal to the weight of the bar, since the bar is in equilibrium.
Therefore, the tension in the wire is approximately 1421 Newtons.