Simple block tension Newton gravity problem

In summary, the 4.00kg block in the figure is attached to a vertical rod by means of two strings. When the system rotates, the strings are extended and the tension in the upper string is 80N. Using a FBD with the forces acting, it can be determined that the tension in the lower cord is 64N and the speed of the block cannot be calculated with the given information.
  • #1
kirby27
32
0
The 4.00kg block in the figure is attached to a vertical rod by means of two strings. when the system rotates about the axis of the rod, the strings are extended and the tension in the upper string is 80N.

A: What is the tension in the lower cord?
B: what is the speed of the block?

FIGURE:
the straight line is the pole. the two angled likes are the strings. each string is 1.25m. the block is 4kg. the distance between the strings on the pole is 2m.
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I drew a horizontal line from the block to the pole and was able to find the angle. this allowed me to find the vertical component of upward tension = 64N. after that i don't know where to go.
 
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  • #2
If a FBD is drawn with the forces acting, then one can give some help.
 

FAQ: Simple block tension Newton gravity problem

1. What is a simple block tension Newton gravity problem?

A simple block tension Newton gravity problem is a problem that involves a block suspended by a rope or string and being pulled by a force of gravity. The goal is to determine the tension in the rope and the acceleration of the block.

2. What is the equation for calculating tension in a simple block tension Newton gravity problem?

The equation for calculating tension in a simple block tension Newton gravity problem is T = m * g, where T is the tension, m is the mass of the block, and g is the acceleration due to gravity.

3. How is the acceleration of the block calculated in a simple block tension Newton gravity problem?

The acceleration of the block can be calculated using Newton's second law of motion, which states that the net force acting on an object is equal to the mass of the object multiplied by its acceleration. In this problem, the net force is the tension in the rope minus the force of gravity, so the equation is ma = T - mg.

4. What factors can affect the tension in a simple block tension Newton gravity problem?

The tension in a simple block tension Newton gravity problem can be affected by the mass of the block, the force of gravity, and the angle at which the rope is suspended. Other external forces, such as air resistance, may also affect the tension.

5. How can a simple block tension Newton gravity problem be solved using free body diagrams?

A free body diagram is a visual representation of all the forces acting on an object. In a simple block tension Newton gravity problem, the free body diagram would show the weight of the block (mg) pointing downwards and the tension in the rope (T) pointing upwards. By using Newton's second law and setting the net force equal to ma, the problem can be solved by finding the tension and acceleration of the block.

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