How to calculate instantaneous velocity

Instantaneous velocity formula: v = δ s/δ t.

Instantaneous velocity is the velocity of an object at a certain moment or through a certain position. At this moment, the ratio of the displacement in an adjacent infinite short time to the time taken to pass the displacement is v=△x╱△t, and the instantaneous velocity is a vector with both magnitude and direction, which is an ideal quantity.

The speed of a moving object at a certain moment or position is called instantaneous speed, which refers to the speed of a moving object at a certain moment or position. Instantaneous velocity is a vector, and the direction of instantaneous velocity at a certain moment is the direction of object movement at that moment.

If an object moves in a straight line at a uniform speed and its speed remains constant during the movement, its instantaneous speed at any moment is the same as the average speed during the whole movement. Instantaneous velocity is a vector. In linear motion, the direction of instantaneous velocity is the same as that of the object, and its magnitude is called instantaneous velocity.

Describe an example of instantaneous speed in life

1. Racing acceleration:

In the racing competition, when the racer steps on the accelerator pedal, the instantaneous speed of the racing car will increase rapidly. At this time, the racer needs to flexibly adjust the speed according to the track situation and the opponent's position.

2. Bicycle brakes:

When the cyclist steps on the brake, the instantaneous speed of the bicycle will gradually decrease. Cyclists need to reasonably control the braking strength according to the road conditions and obstacles ahead to avoid falling down due to sudden stop.

3. Pedestrians crossing the road:

When pedestrians cross the street, they need to choose the crossing time reasonably according to the instantaneous speed of passing vehicles. If the speed is too fast, pedestrians need to wait for the right time to cross the road.

4. When the train starts:

When the train starts, its instantaneous speed will gradually increase. Train drivers need to speed up step by step according to signals and traffic laws to ensure the safety of passengers.

5. Photographic shutter:

When the photographer presses the camera shutter, the camera shutter will open and close quickly, recording the instantaneous picture. The instantaneous speed determines the clarity of the object in the photo.

6. Toy car acceleration:

When children play with the remote control toy car, the preheating speed of the toy car will increase when they step on the accelerator.