A stone falls from a ledge and takes 8 seconds to hit the ground. The stone has an original velocity of 0 m/s. How tall is the ledge? A. 1,254.4 meters B. 39.2 meters C. 78.4 meters D. 313.6 meters

A stone falls from a ledge and takes 8 seconds to hit the ground. The stone has an original velocity of 0 m/s. How tall is the ledge? A. 1,254.4 meters B. 39.2 meters C. 78.4 meters D. 313.6 meters

A stone falls from a ledge and takes 8 seconds to hit the ground. The stone has an original velocity of 0 m/s. How tall is the ledge? A. 1,254.4 meters B. 39.2 meters C. 78.4 meters D. 313.6 meters

A car with a mass of 1,200 kilograms is moving around a circular curve at a uniform velocity of 20 meters per second. The centripetal force on the car is 6,000 newtons. cf = mv^2/r

6000 = 1200*400/r r = 80 meters

Added 92 days ago|5/5/2021 2:20:34 PM

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