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grandymaker [24]
3 years ago
12

Can someone please help me this is urgent!?

Engineering
2 answers:
Thepotemich [5.8K]3 years ago
8 0

Answer:

it would be C

Explanation:

if you look at the times 0-2 you see it goes to 2.0 so now it cant be A or D now if you look at times 2-4 you see it goes to 3.0 so now B isnt right and then 4-6 its stays at 3.0 so now its definitely C

Vlad1618 [11]3 years ago
5 0

Answer: my answer would be C.

Explanation:

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Explanation:

a) The impulse momentum is:

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According the exercise:

v1=0

∑Imp(1---->2) = F(t2-t1)

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Replacing:

0+F(t_{2} -t_{1} )=0.2v_{2}

if F=2 kN and t2-t1=2x10^-3 s. Replacing

0+2x10^{-3} (2x10^{-3} )=0.2v_{2} \\v_{2} =\frac{4}{0.2} =20m/s

b) Work and energy in the system is:

T2 - U(2----->3) = T3

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Replacing:

\frac{1}{2} *0.2*20^{2} -F_{res} *0.001=0\\F_{res} =40000N

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Answer:

The correct option is;

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