Newton's Second Law

Newton's Second Law/Ball Roll Slope/Gravitational Acceleration - Science Museum Exhibits Scheme

Science Behind It

acceleration due to gravity

Gravitational acceleration is the acceleration of an object under the action of gravity. Also known as free fall acceleration, expressed in g. The direction is vertically downward, and its size can be determined by various methods.

Usually refers to the acceleration of an object near the ground falling in a vacuum due to the gravitational force of the Earth, denoted as g. For ease of calculation, its approximate standard value is usually taken as 980 centimeters per second squared or 9.8 meters per second squared. The falling acceleration of objects near the surface of the moon, other planets, or celestial bodies is respectively referred to as the gravitational acceleration of the moon, the gravitational acceleration of a certain planet or celestial body.

Exhibition items description

The exhibition items consist of small balls, tracks, and bells hanging from the tracks. Participants can roll the ball down the track, and during the rolling process, the ball will hit the bell hanging on the track in turn. The audience can adjust the position of the bell to an equal distance, but they will find that the time interval for the ball to hit the ball when rolling is not equal; After calculation, by arranging the bells according to the principle of gravitational acceleration, it will be found that the time interval between the balls hitting the bells is equal.

form of expression

Mechanical interaction

How to Operate

① Participants adjust the position of the bell;

② Place the ball and let it slide off the top of the track;

③ Observe the time interval between the small ball hitting the bell to understand the knowledge of gravitational acceleration;

④ Continue adjusting the position of the bell, or end the experience and leave the exhibits.