Physics, 03.04.2020 19:20 ariloveshorses

A baggage handler throws a 15 kg suitcase along the floor of an airplane luggage compartment with a speed of 1.2 m/s. The suitcase slides 2.0 m before stopping. Use work and energy to find the suitcase’s coefficient of kinetic friction on the floor.

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Answer from: sarath30

If a baggage handler throws a 15 kg suitcase along the floor of an airplane luggage compartment with a speed of 1.2 m/s, the coefficient of kinetic friction = 0.367

The mass of the suitcase, m = 15 kg

The speed of the compartment, v = 1.2 m/s

The distance moved by the baggage, d = 2.0 m

Note that the workdone in moving the suitcase is given by the formula:

W = μmgd.....................(1)

The kinetic energy is given by the formula:

$KE = \frac{1}{2}mv^2$ .....................(2)

Note that the workdone = Kinetic Energy

$\mu mgd = \frac{1}{2}mv^2\\\\\mu gd = 0.5v^2$

Substitute d = 0.2m, v = 1.2 m/s and g = 9.8 m/s² into the equation above

$\mu \times 9.8 \times 2 = 0.5 \times 1.2^2\\\\19.6 \mu = 7.2\\\\\mu = \frac{7.2}{19.6} \\\\\mu = 0.367$

The coefficient of kinetic friction = 0.367

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Answer from: myla18jabbar

0.0367

Explanation:

The loss in kinetic energy results into work done by friction.

Since kinetic energy is given by

KE=0.5mv^{2}

Work done by friction is given as

W= umgd

Where m is the mass of suitacase, v is velocity of the suitcase, g is acceleration due to gravity, d is perpendicular distance where force is applied and u is coefficient of kinetic friction.

Making u the subject of the formula then we deduce that

$u=\frac {v^{2}}{2gd}$

Substituting v with 1.2 m/s, d with 2m and taking g as 9.81 m/s2 then

$u=\frac {1.2^{2}}{2*9.81*2}=0.0366972477064\approx 0.0367$

Therefore, the coefficient of kinetic friction is approximately 0.0367

Answer from: Quest

An atom (ours, not carroll's) consists of a positively charged nucleus, surrounded by one or more negatively charged particles called electrons. the positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. most of an atom's mass is in its nucleus; the mass of an electron is only 1/1836 the mass of the lightest nucleus, that of hydrogen. although the nucleus is heavy, it is quite small compared with the overall size of an atom. the radius of a typical atom is around 0.1 to 0.25 nanometres (nm), whereas the radius of a nucleus is about 10-6 nm. * if an atom were enlarged to the size of the earth, its nucleus would be only 200 feet in diameter and could easily rest inside a small football stadium.read more on -

Answer from: Quest

Sorry i don’t know what to do

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