A car travelling at 36km/h speeds up to 72 km/h in 5s. What is its acceleration?
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: If the same car stops in 20 seconds , what is the acceleration? Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams. In the second case , u=72km/h=20m/s,v=0,t=20s.
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u = 36km/h = 10m/sec
v = 72km/h = 20m/sec
t = 5sec
a = ( v - u ) /t
a = ( 20 - 10 ) / 5
a = 10/5
a = 2 m/sec²
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