Answer
n
1.) Use J=
Δ
p
so……
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J=10N.s(E)=
Δ
p=10kg.m/s(E)
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and since original p was 0kg.m/s
and
Δ
p=10kg.m/s(E),
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new p=10kg.m/s(E)
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then use….. p=mv
so……..
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10kg.m/s(E)=5.0kg x v
so….
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n
v=2m/s(E)