Question

1. if you hit a wall with 500 n of force, what is the amount and direction of the reaction force?
2. describe the difference between mass and weight.

Explanation:

Question 30

Step1: Recall Newton's Third Law

Newton's Third Law states that for every action, there is an equal and opposite reaction. So if the action force (force exerted on the wall) is \( F_{action} = 500\space N \), the reaction force \( F_{reaction} \) should have the same magnitude and opposite direction.

Step2: Determine the reaction force

According to Newton's Third Law, the magnitude of the reaction force is equal to the magnitude of the action force. So \( F_{reaction}= 500\space N \). The direction of the reaction force is opposite to the direction of the force applied on the wall (i.e., if you hit the wall towards the wall, the reaction force is from the wall towards you).

• Mass:
• It is a measure of the amount of matter in an object.
• It is a scalar quantity and its SI unit is kilogram (kg).
• The mass of an object remains constant regardless of its location (e.g., on Earth, Moon, or in space).
• Weight:
• It is the force exerted on an object due to gravity.
• It is a vector quantity (has magnitude and direction) and its SI unit is newton (N).
• The weight of an object changes depending on the gravitational field strength (\( W = mg \), where \( m \) is mass and \( g \) is acceleration due to gravity). For example, an object weighs less on the Moon than on Earth because the Moon's gravitational field is weaker.

Answer:

The amount of the reaction force is \( 500\space N \) and the direction is opposite to the direction of the force applied on the wall.

Question 31