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Juliette [100K]
2 years ago
6

SOMEONE PLEASE HELP!!

Physics
1 answer:
Arisa [49]2 years ago
7 0

Hello!

\large\boxed{\text{C. 7,350,000 J}}

Use the equation:

PE = mgh

Where:

m = mass of the object (kg)

g = acceleration due to gravity (≈9.8 m/s)

h = height above ground (m)

Plug the given values into the equation:

PE = 7500 · 9.8 · 100

PE = 7,350,000 Joules.

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Answer:

A

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What is the name of a length that is 100 times larger than a millimeter
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Hi!

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A 14,000-kg boxcar is coasting at 1.50 m/s along a horizontal track when it suddenly hits and couples with a stationary 10,000-k
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Explanation:

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Mass of a box car, m_1=14000\ kg

Initial speed of a box car, u_1=1.5\ m/s

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Let V is the speed of the cars just after the collision. It is based on the concept of inelastic collision. So, using the conservation of linear momentum we get :

m_1u_1+m_2u_2=(m_1+m_2)V\\\\m_1u_1=(m_1+m_2)V\\\\V=\dfrac{m_1u_1}{(m_1+m_2)}\\\\V=\dfrac{14000\times 1.5}{(14000+10000)}\\\\V=0.875\ m/s

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