Final answer:
The normal force acting on a 220 kg object, when a 495 N upward force is applied, is 1705 N, calculated by subtracting the applied force from the object's weight due to gravity on a horizontal surface.
Step-by-step explanation:
The student is asking about the normal force acting on an object when an additional vertical force is applied. Given that the object has a mass of 220 kg and a vertical force of 495 N is applied upward, the effect on the normal force must be calculated. To find the normal force on a non-accelerating horizontal surface, we use the formula N = mg.
The weight of the object, which is the force due to gravity, is calculated by multiplying the mass (220 kg) by the acceleration due to gravity, which we've approximated as 10 m/s². This gives us a gravitational force of 2200 N. When a 495 N vertical force is applied upward, it reduces the normal force felt by the object by the same amount. Therefore, the normal force is 2200 N - 495 N = 1705 N.