8. Centripetal Forces & Gravitation
Newton's Law of Gravity
18PRACTICE PROBLEM
A tall tree stands alone in the middle of a desert. A physics professor intends to measure its mass with a pendulum. He takes a bob of mass M and places the pendulum at a distance d = 200 m away from the tree. As a consequence, the bob makes an angle of Φ with the vertical due to the gravitational attraction between the bob and the tree. Given that the mass of the tree is 640000 kg, determine the angle Φ.
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A tall tree stands alone in the middle of a desert. A physics professor intends to measure its mass with a pendulum. He takes a bob of mass M and places the pendulum at a distance d = 200 m away from the tree. As a consequence, the bob makes an angle of Φ with the vertical due to the gravitational attraction between the bob and the tree. Given that the mass of the tree is 640000 kg, determine the angle Φ.