a force acts for .2 seconds on an object having mass 1.4 kg initially at rest. the force stops to act but the object moves throuh 4 m in the next 2 seconds . find the magnitude of the force
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F=ma
a=v2-v1/t2-t1
v2=4/2=2 m/s
v1=0
a=2-0)/2
a=1
F=1.4*1
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