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Soloha48 [4]
3 years ago
5

Energy Conservation:

Physics
1 answer:
Rina8888 [55]3 years ago
8 0

Answer:

3.9 m

Explanation:

Assuming no energy losses then all kinetic energy is converted to potential energy

0.5mv^{2}=mgh and making h the subject of the formula

h=\frac {v^{2}}{2g} where m is the mass of bike rider and bike, v is the velocity,  and g is acceleration due to gravity. Taking g as 9.81 m/s2, v as 8.5 m/s then

h=\frac {8.5^{2}}{2\times 9.81}=3.946992864\approx 3.9 m

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Answer:

Scenario C: A 12-kg bucket is raised a distance of 4 m.

Explanation:

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The only force acting on a 2.9 kg canister that is moving in an xy plane has a magnitude of 7.5 N. The canister initially has a
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Answer:15.66 J

Explanation:

mass of block \left ( m\right )=2.9 kg

Force magnitude=7.5 N

Initial velocity =3.9\hat{i} m/s

Final velocity=5.1 \hat{j} m/s

Initial Kinetic Energy=\frac{1}{2}mv^2

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4 years ago
How to understand that an inductor behaves like short circuit and capacitor like an open circuit in steady state in a network?
garik1379 [7]
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8 0
3 years ago
8. What current flows through a 1.15 kW electric fire at a potential difference of
Vilka [71]

Answer:

I = 5[amp]

Explanation:

Electrical power is defined as the product of voltage by current.

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where:

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V = voltage = 230 [V]

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4 0
3 years ago
A ball is thrown downward from the top of a building with an initial speed of 25 m/s.
Bumek [7]

Answer:

h = 69.6 m

Explanation:

Data:

  • Vo = 25 m/s
  • t = 2.0 s
  • g = 9.8 m/s²
  • h = ?

Formula:

  • \boxed{\bold{h=V_{0}*t+\frac{g*(t)^{2}}{2}}}

Replace and solve:

  • \boxed{\bold{h=25\frac{m}{s}*2.0\ s+\frac{9.8\frac{m}{s^{2}}*(2.0\ s)^{2}}{2}}}
  • \boxed{\bold{h=50\frac{m}{s^{2}}+\frac{9.8\frac{m}{s^{2}}*4\ s^{2}}{2}}}
  • \boxed{\bold{h=50\ m+\frac{39.2\ m}{2}}}
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The building has a height of <u>69.6 meters.</u>

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