Question

A body with an initial velocity of 18 km h -1 accelerates uniformly at the rate of 9 cm s-2 over a distance of 200 m. Calculate : (i) the acceleration in ms? (ii) its final velocity in ms- Your answer​

Answer 1

Given, u=18km/h

18*1000/3600 m/s= 5m/s

a=9cm/s² = 9*0.01 m/s² = 0.09m/s²

s=200m

v=?

v²=u²+2as

v²=5²+2(0.09)(200)

v²=25+36

v²=61

v=√61=7.81 m/s

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