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The force F of attraction between two bodies varies jointly as the weights of the two bodies and inversely as the square of the distance between them. Express this fact as a variation using c as a constant. Use M1 and M2 for the weights of the two bodies
Weegy: That's Newton's Law of Gravitation. Since it varies directly with M1 and M2 and inversely with the square of the distance, we have: F \alpha \frac{M_1 M_2}{d^2} Where alpha means that Force is proportional to that. [ But we need a constant, known as proportionality constant, to make the equation true. So: F = c \frac{M_1 M_2}{d^2} ] User: The time it takes to lay a sidewalk of a certain type varies directly as the length and inversely as the number of men working. If eight men take two days to lay 100 feet, how long will three men take to lay 150 feet? Weegy: The answer is 8 days. User: The volume of a right circular cone varies jointly as the altitude and the square of the radius of the base. If the volume of the cone is 154 cu. in. when its altitude is 12 in. and the radius of the base is 3 1/2 in., find the altitude when the volume of the cone is 77 cu. in. and the radius of the base is 2 1/3 in. User: Two quantities vary inversely. If the value of the first is 15 when the value of the second is 18, find the value of the second quantity when the first is 10. Weegy: wo quantities vary inversely. If the value of the first is 15 when the value of the second is 18, find the value of the second quantity when the first is 10. answer is 13 (More)
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