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1 year ago

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A 200 N object is resting on a surface with a coefficient of static friction equal to 0.15. A person pushes horizontally with a

force of 20 N. Calculate the magnitude of the force of friction.

1 answer:

Reika [66]1 year ago

3 0

Answer:

20 N

Explanation:

the force of static friction maximum = Fn * .15 = 200 * .15 = 30 N

the force of friction will cancel out the 20 N force applied

Ff = 20 N

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Two blocks are suspended from opposite ends of a light rope that passes over a light, frictionless pulley. One block has mass m1

rewona [7]

Answer:

a) m₁ = 1.41 kg , b) m₂ = 2.65 kg

Explanation:

For this exercise we will use Newton's second law

Block 1

T - W₁ = m₁ a

Block 2

W₂ - T = m₂ a

We have selected the positive block 1 rising and block two lowering, as the pulley has no friction does not affect the movement

Let's use kinematics to look for acceleration

y = v₀ t + ½ a t²

As part of the rest the initial speed is zero

a = 2 y / t²

a = 2 6.00 / 2²

a = 3 m / s²

Let's replace in the equation of block 1

a) T = m₁ g + m₁ a

m₁ = T / (g + a)

m₁ = 18.0 / (9.8 + 3)

m₁ = 1.41 kg

b) we substitute in the equation of block 2

W₂ - T = m₂ a

m₂ g - m₂ a = T

m₂ = T / (g-a)

m₂ = 18.0 / (9.8 -3)

m₂ = 2.65 kg

4 0

3 years ago

A capacitor is connected to a 9 V battery and acquires a charge Q. What is the charge on the capacitor if it is connected instea

Mazyrski [523]

C = Q/V, and since C is a constant, if voltage is doubled, charged will be doubled as well. Therefore charge will be 2Q

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3 years ago

stellarik [79]

Answer: $0.69\°$

Explanation:

The angular diameter $\delta$ of a spherical object is given by the following formula:

$\delta=2 sin^{-1}(\frac{d}{2D})$

Where:

$d=16 m$ is the actual diameter

$D=1338 m$ is the distance to the spherical object

Hence:

$\delta=2 sin^{-1}(\frac{16 m}{2(1338 m)})$

$\delta=0.685\° \approx 0.69\°$ This is the angular diameter

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3 years ago

a charge Q exerts a 2.4 N force on another charge q.If the distance between the charges is doubled,what is the magnitude of the

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3 years ago

A p-wave arrives at 3:00:00 and the s-wave arrives at 3:07:20, what is the exact distance that the seismic station is away from

maxonik [38]

The exact distance from the seismic station to the epicenter is 6000 km.

<h3>Epicenter of earthquake</h3>

The earthquake's epicenter is the point above the fault location on the earth's surface.

Given that:

A p-wave arrives at 3:00:00 and the s-wave arrives at 3:07:20.

Difference in arrival time = 3:07:20 - 3:00:00 = 7 minutes 20 seconds

From the earthquake time travel graph, a time difference of 7 min 20 sec is at x = 6

The exact distance from the seismic station to the epicenter is 6000 km.

Find out more on Epicenter of earthquake at: brainly.com/question/1969968

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2 years ago