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Natalka [10]
3 years ago
11

Describe the conditions that are necessary for mechanical energy to be a conserved quantity.

Physics
1 answer:
rusak2 [61]3 years ago
5 0
Mechanical energy is conserved when there are no non-conservative forces acting on the body. Examples are friction and elastic forces of stress in a body. These non-conservative forces convert mechanical energy to other forms of energy like heat and sound

Hope this makes sense
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The sense of smell helps protect us against danger. Explain why.
atroni [7]

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3 years ago
One object is at rest, and another is moving. The two collide in a one-dimensional, completely inelastic collision. In other wor
zhannawk [14.2K]

Answer:

Part a)

v = 16.52 m/s

Part b)

v = 7.47 m/s

Explanation:

Part a)

(a) when the large-mass object is the one moving initially

So here we can use momentum conservation as the net force on the system of two masses will be zero

so here we can say

m_1v_{1i} + m_2v_{2i} = (m_1 + m_2)v

since this is a perfect inelastic collision so after collision both balls will move together with same speed

so here we can say

v = \frac{(m_1v_{1i} + m_2v_{2i})}{(m_1 + m_2)}

v = \frac{(8.4\times 24 + 3.8\times 0)}{3.8 + 8.4}

v = 16.52 m/s

Part b)

(b) when the small-mass object is the one moving initially

here also we can use momentum conservation as the net force on the system of two masses will be zero

so here we can say

m_1v_{1i} + m_2v_{2i} = (m_1 + m_2)v

Again this is a perfect inelastic collision so after collision both balls will move together with same speed

so here we can say

v = \frac{(m_1v_{1i} + m_2v_{2i})}{(m_1 + m_2)}

v = \frac{(8.4\times 0 + 3.8\times 24)}{3.8 + 8.4}

v = 7.47 m/s

4 0
3 years ago
Pablo's engineering team has developed a new material that is strong enough to withstand major impacts, including bullets, witho
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Answer:

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Explanation:

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kumpel [21]

Answer:

6

Explanation:

120/30=6

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2 years ago
Two technicians are discussing service information. Technician A says that online service information is only available from the
Westkost [7]
The correct one is A. Technician Only.
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According to the rules,  all vehicle manufacturers are required to make their service information available for everyone online for 'reasonable prices'.
Because of this, vehicle manufacturers started discontinuing the paper format.</span>
4 0
3 years ago
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