3 years ago

QUICK HELP PLEASE!

Physics

1 answer:

IgorLugansk [536]3 years ago

5 0

Answer:

60/90

Explanation:

I think because the train's highest velocity is 60 n the time is 90

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3 years ago

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Energy in a spring:

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3 years ago

A 4.3 kg steel ball and 6.5 m cord of negligible mass make up a simple pendulum that can pivot without friction about the point

Alekssandra [29.7K]

Answer

given,

mass of steel ball, M = 4.3 kg

length of the chord, L = 6.5 m

mass of the block, m = 4.3 Kg

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here the potential energy of the bob is converted into kinetic energy

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As the collision is elastic the velocity of the block is same as that of bob.

now,

work done by the friction force = kinetic energy of the block

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$d=\dfrac{v^2}{2\mu g}$

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the distance traveled by the block will be equal to 7.23 m.

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3 years ago

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larisa86 [58]

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3 years ago

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PIT_PIT [208]

Answer:

W =50 J

Explanation:

given data:

T_h=600 k

T_L=300 k

Q_h=100 J

required:

<u>solution:</u>

║W║=║Q_h║(1-T_L/T_h)

=50 J

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3 years ago

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