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3 years ago

Please help me, i beg you.

Physics

1 answer:

natita [175]3 years ago

8 0

Answer:

Explanation:

A spherical solid metal made up of Nickel, Iron and small amount of sulfur, silicon and oxygen.

you are welcome

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Cuando es más confiable el valor central de una medición

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La media es la medida de tendencia central más utilizada y, en general, se considera la mejor medida de la misma. Sin embargo, hay algunas situaciones en las que se prefiere la mediana o la moda.

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3 years ago

A woman is standing at the rim of a nonuniform cylindrical horizontal platform initially at rest. The platform is free to rotate

Natasha2012 [34]

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4 years ago

A baseball of mass m1 = 0.45 kg is thrown at a concrete block m2 = 7.25 kg. The block has a coefficient of static friction of μs

miskamm [114]

Answer:

a. $v = \frac{mu_sm_2g\Delta t}{m_1}$

b. 21.64 m/s

Explanation:

Let g = 9.81m/s2

a. The weight of the block is product of its mass and gravitational acceleration

$W = m_2g = 7.25*9.81 = 71.1225N$

which is also the normal force acting on the block from the floor so it stays balanced.

N = 71.225N

The static friction of the block is product of its normal force from the floor and the friction coefficient

$F_s = \mu_sN = \mu_sW = mu_sm_2g$

For the block to move, the force generated by the impact must be at least equal to the static friction.

$F = F_s = mu_sm_2g$

The impulse is product of this force and time duration of impact.

$I = F\Delta t = mu_sm_2g\Delta t$

As impulse is generated by change in momentum of the ball, which is product of its mass and velocity v

$I = \Delta p = m_1\Delta v$

$mu_sm_2g\Delta t = m_1 v$

$v = \frac{mu_sm_2g\Delta t}{m_1}$

b. $v = \frac{mu_sm_2g\Delta t}{m_1} = \frac{0.74*7.25*9.81*0.185}{0.45} = 21.64 m/s$

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3 years ago