What force will change the velocity of a body of mass 1 Kg from 20 m/s to 30 m/s in two seconds?
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We have initial velocity(u)=20m/s
Finall velocity(v)=30m/s
Mass of the object =1kg
Period of acceleration=2sec
Hence , required force is given by F=ma
F=m(v-u)/t
F=(30-20)m/s÷2s×1kg
F=5m/s²×1kg
F=5kgm/s²=5N
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