The Universal Force of Gravity

Front

What did Newton observe in the apple orchard?

Back

He saw an apple fall, which led to his insight into movement and gravity.

Front

What does the 1st law of motion state about objects at rest?

Back

Objects at rest stay at rest unless there is an applied force.

Front

Why did Newton conclude that a force must be acting on the Moon?

Back

Because if a force was not acting on the Moon, it would continue in a straight line, but it orbits the Earth instead.

Front

What realization did Newton have about gravity?

Back

Gravity is not restricted to Earth and its surface; it is a force throughout the Universe.

Front

What is the relationship between two objects according to Newton's law of universal gravitation?

Back

There is an attractive force (gravity) that is proportional to the masses of the objects and inversely proportional to the square of the distance between them.

Front

What is 'Big G' in the context of gravity?

Back

Big G is a universal constant, important for understanding the effects of mass and distances in the universe.

Front

What is the value of 'Big G'?

Back

6.674 x 10^-11 N m²/kg².

Front

What does 'little g' represent?

Back

Little g represents the acceleration caused by gravity on Earth, approximately 9.8 m/s².

Front

Is 'little g' a constant?

Back

No, it varies slightly in different places, such as being slightly less on a mountain top than at sea level.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, measured in kilograms, while weight is the force acting on an object due to acceleration, measured in newtons.