The picture shows a physics lab set up.
Why does the disc fall straight down into the glass when we quickly pull the index card away from the glass in a horizontal direction?
(1 point)
Responses
equilibrium
equilibrium
static friction
static friction
kinetic friction
kinetic friction
inertia
inertia
inertia
A student is riding the school bus. The bus stops as the driver applies the brakes. Which of these statements best describes this situation?(1 point)
Responses
The school bus does not lose or gain kinetic energy.
The school bus does not lose or gain kinetic energy.
A force is changing the motion of the bus.
A force is changing the motion of the bus.
The bus is gaining energy because of friction.
The bus is gaining energy because of friction.
There is no force acting on the bus so it stops moving.
A force is changing the motion of the bus.
The correct answer is: inertia.
When we quickly pull the index card away from the glass in a horizontal direction, the disc falls straight down into the glass due to the principle of inertia. Inertia is the tendency of an object to resist changes in its state of motion. The disc, being at rest on the card, will tend to stay at rest when the card is suddenly moved. As a result, the disc remains in its initial position and falls straight down into the glass due to the force of gravity.
The reason the disc falls straight down into the glass when you quickly pull the index card away from the glass in a horizontal direction is due to the concept of inertia.
Inertia is the tendency of an object to resist changes in its state of motion. When the index card is pulled horizontally, there is a sudden change in the object's motion. However, due to inertia, the disc wants to maintain its current state of rest or motion.
As the index card is pulled away, there is no force acting on the disc in the horizontal direction to counteract its inertia. Therefore, the disc continues to move in the same horizontal direction until the force of gravity starts acting on it.
Once the disc is no longer supported by the index card, it falls straight down into the glass because gravity is pulling it downwards. The absence of any horizontal force allows gravity to act vertically, causing the disc to fall directly into the glass.
So, the correct answer to why the disc falls straight down into the glass when the index card is pulled horizontally is "inertia".