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lara [203]
3 years ago
7

A bullet of mass 20 gram traveling hoirzentally at 100 m/s embeds itself in the center of a block of wood mass 1 kg which is sus

pended by light vertical string 1 meter in length get cleared to maximum inclination of the string to the vertical​?

Physics
1 answer:
Lady_Fox [76]3 years ago
6 0

Answer:

36.5°

Explanation:

Momentum is conserved immediately before and after the collision.

m₁ u₁ + m₂ u₂ = m₁ v₁ + m₂ v₂

(0.020 kg) (100 m/s) + (1 kg) (0 m/s) = (0.020 kg) v + (1 kg) v

v = 1.96 m/s

After the collision, energy is conserved.

KE = PE

½ m v² = mgh

½ v² = gh

h = v² / (2g)

h = (1.96 m/s)² / (2 × 9.8 m/s²)

h = 0.196 m

We need the angle that the string forms with the vertical.  Knowing the length of the string and the height that the block rises, we can do some geometry (see attached diagram).

L − L cos θ = h

L (1 − cos θ) = h

1 − cos θ = h / L

cos θ = 1 − h / L

cos θ = 1 − (0.196 m / 1 m)

θ = 36.5°

Round as needed.

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Answer:

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Explanation:

To know the the correct answer to the question given above, we shall determine the net force acting on the bat. This can be obtained as follow:

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From the calculation made above, we can see that the net force is 5N in Alfredo's direction. This is the reason why Alfredo end up having the bat.

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3 years ago
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Enter an expression for the force constant for the floating raft, in terms of L, g, and the density of water, ρ.
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