Although the Earth’s gravitational force attracts the moon, we do not see the moon falling towards the Earth because the moon’s orbital motion keeps it in a stable orbit around the Earth.
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Newton argued that at each point in its orbit, the moon falls towards the Earth instead of moving off in a straight line, indicating that it is being continuously attracted by the Earth’s gravitational force.
Newton conjectured that the same type of force, gravitational force, is responsible for attracting both the apple towards the Earth and the moon towards the Earth.
Newton considered whether the same force that causes the apple to fall could also be responsible for the moon’s orbit around the Earth.
The fall of an apple from a tree, which reportedly hit him, inspired Isaac Newton to think about gravitational force.
Gravitational force causes an object dropped from a height to fall towards the Earth.
There must be a gravitational force acting on the moon and the planets for them to maintain their orbits around the Earth and the Sun, respectively.
Isaac Newton recognized that the same gravitational force is responsible for objects falling to the Earth, the motion of planets around the Sun, and the moon orbiting the Earth.
The speed of work done by a vehicle or machine, or how quickly it changes energy or performs work, is a basis for its classification in terms of power. This helps in understanding its efficiency and performance capabilities.
A more powerful vehicle can complete a journey in a shorter time than a less powerful one because it can convert energy and perform work more quickly.