A man sitting on a chair and exerting 100 n of force downward while a spring beneath the chair exerts 150 n of force upward.
In this scenario, the man exerts a downward force of 100 N on the chair. Simultaneously, the spring exerts an upward force of 150 N on the chair.
Since the man is sitting on the chair, according to Newton's third law of motion, the chair exerts an equal and opposite force of 100 N upward on the man. This force is known as the normal force.
The net force acting on the chair can be calculated by summing up the forces acting on it. In this case, the net force is the difference between the spring force and the man's force:
Net force = upward spring force - downward force exerted by the man
Net force = 150 N - 100 N
Net force = 50 N (upward)
Therefore, the net force acting on the chair is 50 N upward.
To understand the situation described, let's break it down step-by-step:
Step 1: A man sitting on a chair exerts 100 N of force downward. This means the man is pushing down on the chair with a force of 100 N.
Step 2: A spring beneath the chair exerts 150 N of force upward. This means the spring is pushing up on the chair with a force of 150 N.
Step 3: To determine the overall force experienced by the chair, we need to calculate the net force. The net force is the difference between the downward force exerted by the man and the upward force exerted by the spring.
Net Force = (Force exerted by the man) - (Force exerted by the spring)
Net Force = 100 N - 150 N
Net Force = -50 N
Step 4: The negative sign in the net force indicates that the chair is experiencing a net downward force. In other words, the force exerted by the spring is not enough to balance the force exerted by the man, resulting in a net force of 50 N acting downward on the chair.
Overall, the man sitting on the chair is exerting a net downward force of 50 N, despite the upward force exerted by the spring.
To answer the question, we need to determine the net force acting on the man sitting on the chair. The net force is calculated by subtracting the upward forces from the downward forces.
In this situation, the man exerts a downward force of 100 N, and the spring exerts an upward force of 150 N. To calculate the net force, we subtract the upward force from the downward force:
Net force = Downward force - Upward force
Net force = 100 N - 150 N
Net force = -50 N
The negative sign indicates that the net force is in the downward direction. Therefore, the net force acting on the man is 50 Newtons downward.