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Aleksandr [31]
3 years ago
14

A cart rolling at ground level has K = 1500 J. It comes to a ramp, rolls up the ramp to an elevated platform. When it's on this

elevated platform, it has K = 1000 J. What does its gravitational potential energy equal on top of that platform?
Physics
1 answer:
Black_prince [1.1K]3 years ago
8 0
The potential energy Wood be 1000
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Results of attitude research with twins has revealed
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Answer and explanation;

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The 45-g arrow is launched so that it hits and embeds in a 1.40 kg block. The block hangs from strings. After the arrow joins th
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Question: How fast was the arrow moving before it joined the block?

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The arrow was moving at 15.9 m/s.

Explanation:

The law of conservation of energy says that the kinetic energy of the arrow must be converted into the potential energy of the block and arrow after it they join:

\dfrac{1}{2}m_av^2 = (m_b+m_a)\Delta Hg

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g= 9.8m/s^2

and simplify to get:

\boxed{ v= 15.9m/s}

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Answer:

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