please answer this question with method
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mass(m)=5kg
time(t)= 2s
initial velocity (u)=3m/s
final velocity (v)=8m/s
F=m(v-u)/t
5(7-3)/2
=5*4/2
=20/2
=10N
now,
time(t)=5 sec
u=7m/s
F=m(v-u)/t
10=5(v-7)/5
10*5=
50=5(v-7)
50/5=v-7
10=v-7
10+7=v
17=v
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