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if a train travelling at 10 m/s starts to accelerate at 1 m/s² for 15 seconds on a straight track calculate its final speed in m/s |
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Answer» d that:Initial VELOCITY = 10 mpsAcceleration = 1 mps sq.Time = 15 secondsTo CALCULATE:Final velocitySolution:Final velocity = 25 mpsUsing concept(s):To solve this QUESTION we can USE either first equation of motion or acceleration formula.Using formula(s): • Acceleration formula:a = (v-u)/t • First equation of motion:v = u + atWhere, a denotes acceleration, v denotes final velocity, u denotes initial velocity, t denotes time TAKEN. Required solution:~ By using acceleration formula!»»» a = (v-u)/t »»» 1 = (v-10)/15»»» 1 × 15 = v - 10»»» 15 = v - 10»»» 15 + 10 = v»»» 25 = v »»» v = 25 mps»»» Final velocity = 25 mps~ By using first equation of motion!»»» v = u + at»»» v = 10 + 1(15)»»» v = 10 + 15 »»» v = 25 mps»»» Final velocity = 25 mpsAdditional information: |
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