A cow’s mass is 410 kg and a car’s mass is 565 kg. What is the difference between their weights?

Physics

1 answer:

solmaris [256]3 years ago

5 0

B. 1520 is the difference between their weights.

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Monica [59]

You are dealing with pulleys?

can be done with addition of the two equations to eliminate T.

$(2^{*}) \quad {} -m_1 g \cos \theta + T = m_1 a _2$
+
$(4^{*}) \quad 3m_1 g - T = 3m_1 a_2$
=

$(-m_1 g \cos\theta + 3m_1 g) + (T - T) = m_1 a _2 + 3m_1 a_2 \implies \\ \\
(-m_1 g \cos\theta + 3m_1 g) = 4m_1 a_2 \implies \\ \\
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we can cancel m₁ by dividing both sides by it, assuming mass is not zero

$(- g \cos\theta + 3g)= 4a_2 \implies \\ \\
a_2 = \dfrac{- g \cos\theta + 3g}{4} \\ \\
a_2 = \dfrac{- 9.80 \cos 60 + 3(9.80)}{4} \\ \\
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$

a₂ = 6.125 m/s² ( do significant digits if you need to)

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3 years ago

Julie is holding a 5 kg book 1 m above the ground, Bob is holding a 10 kg book 2 m above the ground and Anna is holding a 7.5 kg

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He amount of current flowing in a circuit can be measured by

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First question:
The magnitude of current flowing in a circuit is described in
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or Ammeter.

Second question:
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answer. Although 'E' is often used as the symbol for Electromotive
force, potential difference, and voltage, there's certainly no rule.
Anyone is free to use 'M', 'Q', 'Θ', or 'Щ' to denote voltage when
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explain the meaning of whatever symbols they use.

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4 years ago

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maksim [4K]

Answer:

Magnitude of the hiker's total displacement = 3.5 km

Angle and direction of the hiker's total displacement = 22 degree south of west

Explanation:

The first Displacement in vector form is

$s_1$ = -4.5 cos 45i +4.5 sin 45j