15 Questions
What happens to the state of motion of an object when there is no net force acting on it?
It remains in its state of rest or motion
What is the net force when a 5 N force to the right and a 5 N force to the left act on an object?
0 N
What is the direction of the net force when a 5 N force to the right and a 15 N force to the left act on an object?
To the left
What is the purpose of a free-body diagram?
To represent the forces acting on an object visually
What is the state of an object when the net force acting on it is zero?
In equilibrium
What is the net force when a 600 N force downward and a 200 N force upward act on an object?
400 N downward
What is important to include in a free-body diagram?
The magnitude and direction of each force, labeled
What happens to an object when there is a net force greater than zero acting on it?
It accelerates or decelerates
What is the term for the total amount of money you earn in a year?
Gross amount
What is the difference between gross and net amounts?
Gross amount is the amount after deductions, while net amount is the total amount
What is the vector sum of all forces acting on an object?
Net force
Why can't we simply add up forces to get a total amount?
Because forces are vector quantities with both magnitude and direction
How do we represent vectors, like forces, graphically?
With arrows
What is the unit of measurement for forces, mentioned in the passage?
Newton
What is similar to calculating net force, according to the passage?
Adding positive and negative numbers
Study Notes
Forces Are Vectors
- Forces are vector quantities with both magnitude and direction, represented by arrows.
- The size of the arrow indicates the relative magnitude of the force, while the direction of the arrow shows the direction the force is acting.
Calculating Net Force
- Net force is the vector sum of all forces acting on an object.
- To calculate net force, find the difference between forces as you add up the vectors.
- Forces can cancel each other out if they have the same magnitude and opposite directions.
Examples of Net Force
- If two forces of 5 N are acting on an object, one to the left and one to the right, the net force is zero.
- If two forces of 5 N are acting on an object in the same direction, the net force is 10 N in that direction.
- If forces of 5 N to the right and 15 N to the left are acting on an object, the net force is 10 N to the left.
Net Force and State of Motion
- Newton's first law states that an object continues in its state of rest or motion unless acted on by an outside unbalanced force.
- Forces are unbalanced when there is a net force greater than zero.
- When there is no net force, the forces are balanced, and the object is in equilibrium.
Free-Body Diagrams
- Free-body diagrams are visual representations of the forces acting on an object.
- Vectors in free-body diagrams represent forces, with the size of the arrow indicating magnitude and the direction indicating direction.
- The object is represented by a box, and the forces acting on the object come out from its sides.
- Labels should be included in free-body diagrams to identify the forces and their magnitudes.
Learn about the difference between gross and net earnings, and how deductions like taxes and insurance premiums affect your take-home pay.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
