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s2008m [1.1K]
3 years ago
6

Which of the following is an example of velocity?

Physics
2 answers:
pav-90 [236]3 years ago
8 0
C :) cause a direction has nothing do do with velocity !
Anastasy [175]3 years ago
8 0
B. because Velocity<span> is a physical vector quantity; both magnitude and direction are needed to define it</span>
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What's faster a slow car or a fast feather?​
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A fast feather

Explanation:

The faster any item is, the more momentum it has

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Calculate the elastic potential energy stored in a spring if it has a force constant of 150 N/m. the spring is extended to a len
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Answer:

6.75J

Explanation:

U=1/2KΔx²

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A greenhouse is an example of a(n) __________________________________. Question 7 options: active solar energy system. biomass g
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2 years ago
Particle A and particle B are held together with a compressed spring between them. When they are released, the spring pushes the
yaroslaw [1]

Answer:

 K_a = 8,111 J

Explanation:

This is a collision exercise, let's define the system as formed by the two particles A and B, in this way the forces during the collision are internal and the moment is conserved

initial instant. Just before dropping the particles

          p₀ = 0

final moment

          p_f = m_a v_a + m_b v_b

          p₀ = p_f

          0 = m_a v_a + m_b v_b

tells us that

          m_a = 8 m_b

         

           0 = 8 m_b v_a + m_b v_b

           v_b = - 8 v_a                    (1)

indicate that the transfer is complete, therefore the kinematic energy is conserved

starting point

           Em₀ = K₀ = 73 J

final point. After separating the body

          Em_f = K_f = ½ m_a v_a² + ½ m_b v_b²

           K₀ = K_f

           73 = ½ m_a (v_a² + v_b² / 8)

           

we substitute equation 1

           73 = ½ m_a (v_a² + 8² v_a² / 8)

           73 = ½ m_a (9 v_a²)

           73/9 = ½ m_a (v_a²) = K_a

            K_a = 8,111 J

3 0
3 years ago
Can an object have increasing speed while its acceleration is decreasing?
alexdok [17]
The best option is C. This is due to friction.
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3 years ago
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