Applied Physics Vocabulary Test

Explanation
Friction is a force that opposes motion. It acts in the opposite direction to the motion of an object, making it difficult for the object to move. Friction is caused by the interaction between the surfaces of two objects that are in contact with each other. It can be influenced by factors such as the roughness of the surfaces and the amount of force applied. Friction is present in various everyday situations, such as when walking on the ground or when trying to move a heavy object. It is an essential force that helps to control and regulate motion in our daily lives.

Explanation
Motion is a change of position in a certain amount of time. It refers to the movement or displacement of an object or person from one place to another. It involves a change in location and can be described in terms of speed, direction, and velocity. Motion can occur in various forms such as linear, circular, or oscillatory, and it is a fundamental concept in physics and everyday life.

Explanation
Gravity is the force of attraction that exists between two objects. It is a fundamental force in nature that pulls objects towards each other. This force is responsible for keeping planets in orbit around the sun, objects falling to the ground, and the overall structure of the universe. Gravity is determined by the mass of the objects and the distance between them. The greater the mass, the stronger the gravitational force.

Explanation
The correct answer is inertia. Inertia is the tendency of an object to resist changes in its motion, whether it is at rest or moving. This means that an object will stay at rest unless acted upon by an external force, and an object in motion will continue moving in a straight line at a constant speed unless acted upon by an external force. Inertia is a fundamental property of matter and is related to an object's mass.

Explanation
Work is the application of force to make an object move in the direction of the force. When a force is applied to an object and causes it to move, work is being done. Work is calculated by multiplying the force applied to an object by the distance over which the force is applied. It is a measure of the energy transferred to the object and is expressed in joules.