The classic example of gravitational force is that of an apple falling from a tree. Once its stem breaks, the apple accelerates toward the Earth's center of gravity at a rate of 9.8 m/s^2. The effect of gravity is observ... More »

The gravitational force of Mars is 38 percent of Earth's gravity. This low gravity is due to the fact that Mars only possesses 11 percent of the Earth's mass and 15 percent of the Earth's volume. The planet's significant... More » Science Astronomy Planets

A planet's size and mass determines its gravitational force it has on objects and people. Five planets are smaller than Earth and only two are larger. More »

Gravitational pull is the invisible force that causes massive objects to pull other objects towards them. For instance, when a person jumps up in the air, it is the earth’s gravitational pull that causes him to return to... More »

As the distance between two objects decreases, the gravitational force between them increases. Conversely, as the distance between them increases, the gravitational force decreases. Gravitational force is inversely propo... More »

One example of a catchy title for a science project on forces is : "May the force by with you." A good science project title should be catchy and meaningful. A great way to achieve this is to use common expressions that ... More »

Riding a bike is an example of Newton's third law of motion because the force needed to pedal a bike forward, which is the force that the tire exerts on the ground, is equal to the force of the ground pushing against the... More »