In an elastic collision, the momentum is _, and the mechanical energy is _.

Physics

1 answer:

olga nikolaevna [1]2 years ago

6 0

The answer to your question is b

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A girl is sitting in a sled sliding horizontally along some snow (there is friction present). The mass of the girl is 29.8 kg an

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Answer:

28.81 m

Explanation:

Ff = -123

m * a = -123

(29.8+10.3) * a = -123

a = -123/40.1 = -3.07

We know,

v^2 = u^2 + 2as

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s = 176.89/6.14 = 28.81

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A 110-g bullet is fired from a rifle having a barrel 0.636 m long. Choose the origin to be at the location where the bullet begi

astraxan [27]

Data:
mass = 110-g bullet
d = 0.636 m
Force = 13500 + 11000x - 25750x^2, newtons.

a) Work, W

W = ∫( F* )(dx) =∫[13500+ 11000x - 25750x^2] (dx) =

W = 13500x + 5500x^2 - 8583.33 x^3 ] from 0 to 0.636 =

W = 8602.6 joule

b) x= 1.02 m

W = 13500x + 5500x^2 - 8583.33 x^3 ] from 0 to 1.02

W = 10383.5

c) %

[W in b / W in a] = 10383.5 / 8602.6 = 1.21 => W in b is 21% more than work in a.

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Answer:

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