Question

Imagine that the gravitational force between Earth and Moon is provided by an invisible string that exists between the Moon and Earth. What is the tension that exists in this invisible string due to Earth’s centripetal force? (Mass of the Moon = 7.34 × 10²² kg, Distance between Moon and Earth = 3.84 × 10⁸ m)

Answer 1

Given,

Mass of the moon = 7.34 × 10²² kg

Distance between moon and earth = 3.84 × 10⁸ m

Centripetal force = F = `(mV^2)/r = (7.34 xx 10^22 xx (1.023 xx 10^3)^2)/(3.84 xx 10^8) = 2 xx 10^20`N.