a force acts for 0.2 sec on an object having a mass 1.4 initially at rest .the force stops to act but the object moves through 4m in the next 2sec find the magnitude of the force
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Time=0.2sec.
Mass=1.4kg.
after force stops object moves through 4m in next 2sec.
Distance=4m.
Time=2sec
velocity=distance/time.
velocity=4/2.
velocity=2m/s.
initial velocity (u)=0
final velocity (v)=2
acceleration=v-u/t.
acceleration=2-0/0.2.=10m/s.
force= mass* acceleration
1.4*10=14N.
Magnitude of the force=14N.
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