What two facts did Newton need to be able to calculate the acceleration of the Moon?
1) the distance to the Moon and the diameter of the Moon.
2) the time it takes the Moon to make one revolution and the distance from the Earth to the sun.
3) the diameter of the Moon and the diameter of Earth.
4) the diameter of the Moon and the speed of the Moon's rotation.
5) the distance to the Moon and the time it takes the Moon to make one revolution.
The correct answer is:
5) the distance to the Moon and the time it takes the Moon to make one revolution.
By knowing the distance to the Moon and the time it takes the Moon to complete one revolution around the Earth, Newton could use his laws of motion and gravitation to calculate the Moon's acceleration.
The correct answer is:
5) the distance to the Moon and the time it takes the Moon to make one revolution.
To calculate the acceleration of the Moon, Newton needed to know the distance to the Moon and the time it takes the Moon to complete one revolution around the Earth.
By knowing the distance to the Moon and the time it takes for the Moon to complete one orbit around the Earth, Newton was able to apply his laws of motion and gravitation to calculate the gravitational acceleration acting on the Moon. This gravitational acceleration is the force that keeps the Moon in its orbit around the Earth.