1.

A bicycle increases its speed frorn 10 km/h to 15 km/h in 6 seconds. Calculate its acceleration

Answer»

Initial velocity = u = 10 km /hr = 10 x 5 /18= 2.77777= 2.8 m /s

Final velocity = v = 15 km / hr= 15 x 5 / 18= 4.16 m /s [ approx .]

Time = t = 6 sec

a = acceleration

Equation of motion :

v = u + at

4.16 = 2.8 + 6a

6a + 2.8 = 4.16

6a = 4.16 - 2.8

6a = 1.36

a = 1.36 / 6

a = 0.22 m /s²



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