4 years ago

A compass is a magnet and Earth is a magnet. How does the magnetism of a compass work with the

Physics

1 answer:

Doss [256]4 years ago

7 0

The compass magnet aligns itself with the earths magnetic field.

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Which type of energy is the energy of a moving tennis ball

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Kinetic energy.

The explanation never existed

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Is our feelings is depends on electrostatic force??

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is our feeling depend or electrostatic force

no our feelings doesn't depends on electrostatic force

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So,

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4 years ago

g An Atwood machine has two hanging masses, m1 and m2, attached with a massless string over a pulley. If the pulley spins, rathe

vodka [1.7K]

Answer:

$m_1( g -a) = T_1$

$T_2 = m_2 (a +g)$

Explanation:

Given data;

Two hanging mass is given as m1 and m2

Mass of pulley is given as m3

radius of pulley is r

Assuming mass m1 is greater than m2

Take downward direction for mass m1

and upward direction for mass m2

and clockwise direction of pulley is positive

from newton second law on each mass

for Mass m1

$\sum F_y = m_1 a_y$

$m_1 g -T_1 = m_1 a$

$m_1( g -a) = T_1$

for Mass m2

$\sum F_y = m_2 a_y$

$T_2 - m_2 g = m_2 a$

$T_2 = m_2 (a +g)$

fro pulley

$\sum \tau = I\alpha$

$rT_1 -rT_2 =1/2 m_p r^2 \alpha$

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3 years ago

A student swings a 5.0 Kg pail of water in a vertical circle of radius 1.3m. What is the minimum speed at the top of the circle

cestrela7 [59]

Answer:

v = 3.57 m / s

Explanation:

Let's use Newton's second law in the upper part of the circle, with the minimum speed so that the water does not rest on the circle, that is, the normal is zero

W = m a

acceleration is centripetal

a = v² / r

let's substitute

mg = m v² / r

v = $\sqrt{r g }$

let's calculate

v = $\sqrt{1.3 \ 9.8}$ ra 1.3 9.8

v = 3.57 m / s

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3 years ago