The picture shows a physics lab setup.%0D%0A%0D%0A %0D%0A%0D%0A%0D%0A %0D%0AWhy does the disk fall straight down into the glass when the index card is quickly pulled away from the glass in a horizontal direction?%0D%0A%0D%0A(1 point)%0D%0AResponses%0D%0A%0D%0AStatic friction%0D%0AStatic friction%0D%0A%0D%0AKinetic friction%0D%0AKinetic friction%0D%0A%0D%0AInertia%0D%0AInertia%0D%0A%0D%0AEquilibrium
The correct response is: Inertia
The disk falls straight down into the glass when the index card is quickly pulled away from the glass in a horizontal direction because of inertia.
Inertia is the tendency of an object to resist changes in its motion. In this case, when the index card is quickly pulled away, the disk initially remains at rest due to static friction between the card and the disk. However, once the card is removed, there is no longer any force acting on the disk horizontally to keep it in place.
Therefore, the disk's inertia causes it to continue moving in a straight line and fall vertically downward into the glass.
The disk falls straight down into the glass because of inertia. Inertia is the tendency of an object to resist changes in its motion. When the index card is quickly pulled away from the glass in a horizontal direction, the disk remains at rest due to its inertia, resulting in it dropping straight down into the glass.
To understand this, you can consider Newton's first law of motion, also known as the law of inertia. This law states that an object at rest will stay at rest, and an object in motion will continue in motion with a constant velocity, unless acted upon by an external force.
In this case, the disk is initially at rest, and when the index card is pulled away, there is no external force acting on the disk to stop it from falling straight down. The only force acting on the disk is gravity, which causes it to accelerate towards the ground due to its weight.
Therefore, the correct answer to why the disk falls straight down into the glass when the index card is quickly pulled away is inertia.