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a bus is traveling at 72km/hr. brakes are applied and the bus comes to a stop after 10 minutes. find the retardation of the brakes |
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Answer» Provided that: Final velocity = 0 mpsInitial velocity = 72 kmphTime = 10 minutesTo calculate: The accelerationSolution: The retardation = -0.03 m/s²Using concepts: • Formula to convert kmph-MPS.• Formula to convert min-sec! • To calculate the acceleration we can use either first equation of motion or formula to calculate the acceleration.Using formulas: • Acceleration formula: • First equation of motion: • Formula to convert min-sec: ~ Firstly LET us convert kmph-mps! Henceforth, Initial velocity = 20 mpsFinal velocity = 0 mps~ Now let's convert min-sec! Henceforth, TIME = 600 seconds~ Let's calculate the acceleration now! By using acceleration formula. By using first equation of motion. |
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