. A car increases its speed from 20km/h to 50km/h in 10 seconds. What is its acceleration?
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u=20 kmph
=20 x 5/18 )m/s
=50/9 m/s
v=50 kmph
=( 50 x 5/18 )m/s
=125/9 m/s
t=10 seconds
a=?
as we know that:
v=u+at
125/9 = 50/9 + a x 10
125/9 - 50/9 = 10 a
75/9 = 10 a
a = 75/90
a = 15/18
a = 0.83 m/s^2
=20 x 5/18 )m/s
=50/9 m/s
v=50 kmph
=( 50 x 5/18 )m/s
=125/9 m/s
t=10 seconds
a=?
as we know that:
v=u+at
125/9 = 50/9 + a x 10
125/9 - 50/9 = 10 a
75/9 = 10 a
a = 75/90
a = 15/18
a = 0.83 m/s^2
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