Final answer:
The tension in the given pulley system is 150N.
Step-by-step explanation:
In the given pulley system, the tension (T) can be calculated using the principle of conservation of energy. Since the system is ideal, the tension in the rope will be the same on both sides of the pulley.
When a car engine of mass 115 kg is supported by the pulley, the tension in the rope would be equal to the weight of the engine (mass x gravitational acceleration).
T = m * g = 115 kg * 9.8 m/s^2 = 1127 N.
Therefore, the correct answer is (4) 150N.