Newton's First Law and Identifying Forces

Flashcards covering key concepts from Lesson 2 on Newton's First Law of Motion, combining force calculations, balanced vs. unbalanced forces, inertia, and friction.

What is the net force when a force of $200\,N$ to the left and another force of $50\,N$ to the left act on an object?

$250\,N$ to the left

Are forces of $200\,N$ to the left and $50\,N$ to the left classified as balanced or unbalanced forces?

Unbalanced forces

What is the net force when a force of $100\,N$ to the right and a force of $80\,N$ to the left act on an object?

$20\,N$ to the right

Are forces of $100\,N$ to the right and $80\,N$ to the left classified as balanced or unbalanced forces?

Unbalanced forces

What is the net force when a force of $180\,N$ to the right and a force of $180\,N$ to the left act on an object?

$$0\,N$$

Are forces of $180\,N$ to the right and $180\,N$ to the left classified as balanced or unbalanced forces?

Balanced forces

According to Newton's first law of motion, what happens to an object at rest if the net force acting on it is zero?

The object remains at rest.

According to Newton's first law of motion, what happens to an object in motion if the net force acting on it is zero?

The object continues moving at a constant velocity (same speed and direction).

How do balanced forces affect an object's motion and velocity?

Balanced forces do not change an object's motion, resulting in an unchanged velocity.

How do unbalanced forces affect an object's velocity?

Unbalanced forces result in a changed velocity (acceleration, deceleration, or change in direction).

What is the effect of inertia on objects at rest and objects in motion?

Inertia causes objects at rest to stay at rest and objects in motion to keep moving at a constant velocity unless acted upon by an unbalanced force.

Why do moving objects on Earth eventually stop moving?

Friction acts as an unbalanced force opposing the motion, causing the object to slow down and stop.

Why are stationary objects around us subjected to a net force of zero rather than no forces at all?

Multiple opposing forces act on them simultaneously (such as gravity pulling downward and the normal force pushing upward), which cancel each other out to equal a net force of zero.