Answer :

Final answer:

The tension in the rope pulling the log up the ramp needs to equal the weight of the log for smooth movement. This can be calculated using Newton's second law of motion and the concept of force balance.

Explanation:

The question relates to the concept of physics, particularly mechanics. When the 215 kg log is being pulled up a ramp by a rope, the principle involved here is the equilibrium of forces. The tension in the rope is supplying the force to pull the log up. This force needs to be equal to the weight of the log for it to move up the ramp smoothly. We can use Newton's second law to express this situation. Since the log is being pulled up, the only forces acting on it are its weight and the tension supplied by the rope. The weight of the log W, can be calculated using the equation W=mg (where m is the mass and g is the acceleration due to gravity). Now the tension, T in the rope needs to be equal to the weight for the log to be in equilibrium, Thus, we get T = W. Hence, the minimum tension required in the rope to pull the log up would be equal to the weight of the log. In this case, T= (215 kg)(9.81 m/s² ). The concept of pulling objects using a rope and the forces interacting in this process is a fundamental idea in understanding the principles of mechanics in physics.

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