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Marizza181 [45]
3 years ago
10

Using a horizontal force of 200N,we intend to move a wooden cabinet across a floor at constant velocity.What is the friction for

ce that will be exerted on the cabinet?
With explanation please
Physics
1 answer:
IgorLugansk [536]3 years ago
8 0

Answer:

-200 N

Explanation:

The cabinet moves at constant velocity, so that means there's no acceleration.

Applying Newton's second law to the cabinet:

∑F = ma

F + 200 = 0

F = -200

The friction force is 200 N in the opposite direction.

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8 0
3 years ago
In a pulley system, two blocks are connected by a rope as shown below. The coefficient of static friction between block A and th
umka21 [38]

Hi there!

We can begin by doing a summation of forces for each block.

Block A:

This block has the force of tension (in direction of acceleration +) and static friction (opposite direction -) acting on it. Thus:

\Sigma F_A = T - F_s\\\\m_Aa = T - \mu m_Ag

Block B:

This block has the force of tension (opposite of acc. -) and gravity (in direction of acc +), working on it.

\Sigma F_B = m_Bg - T\\\\ m_Ba = m_Bg - T

Add both of the expressions and solve for the maximum mass of Block B.

\Sigma F = m_Bg - T + T - \mu m_Ag\\\\a(m_A + m_B) = m_Bg - \mu m_Ag

To find the minimum value, we can set a = 0, so:

0 = m_Bg - \mu m_Ag\\\\\mu m_Ag = m_B g\\\\0.8(20)(9.8) = m_B (9.8)\\\\m_B = \frac{0.8(20)(9.8)}{9.8)} = \boxed{16 kg}

The block must weigh <u>> 16 kg</u> for block A to move.

5 0
3 years ago
A spring has a length of 0.200 m when a 0.300-kg mass hangs from it, and a length of 0.750 m when a 1.95-kg mass hangs from it.
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Answer:

Explanation:

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2 years ago
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blondinia [14]

Answer:

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Explanation:

The closer the planet is to the Sun, the greater the pull of the Sun's gravity, and the faster the planet orbits.

While, over here the Pluto is very far away from the Sun so it will have very little gravitational  pull and still keeps revolving around the Sun

<h2><u><em>Pls Mark Brainliest</em></u></h2>
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3 years ago
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