What happens when two objects of equal mass collide?
Two objects that have equal masses head toward each other at equal speeds and then stick together. The two objects come to rest after sticking together, conserving momentum but not kinetic energy after they collide. Some of the energy of motion gets converted to thermal energy, or heat.
What cause the object change in motion?
A force is a push or pull that can cause an object to move, stop, or change speed or direction. 3. The greater the force, the greater the change in motion. Gravity (the earth’s pulling force) and friction (the force between two surfaces) are common forces that work against motion.
How can you tell that the object is in motion?
An object is in motion if its distance relative to another object is changing. To tell if an object is moving, you use a reference point. If an object’s distance from another object [reference point] is changing. A place or object used for comparison to determine if something is in motion.
What is the relationship of speed and position of object to the amount of energy?
This equation reveals that the kinetic energy of an object is directly proportional to the square of its speed. That means that for a twofold increase in speed, the kinetic energy will increase by a factor of four. For a threefold increase in speed, the kinetic energy will increase by a factor of nine.
What is the change in position of an object over time?
Motion – an objects change in position over time when compared to a reference point.
What is the rate at which an object moves?
Ch. 11 & 12 Vocabulary
| A | B |
|---|---|
| speed | The ratio of the distance an object moves to the amount of time the object moves. |
| average speed | The total distance traveled divided by the time it takes. |
| instantaneous speed | The rate at which an ojbect is moving at a given moment in time. |
| velocity | The speed and direction of an object. |
What is the rate at which an object is moving at a given instant?
Average speed is the rate at which an object is moving at a given instant in time. Instantaneous speed is the rate at which an object is moving at a given instant in time. When you know both the speed and distance of an object’s motion, you know the velocity of the object.