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Vlad [161]
2 years ago
15

A book falls of the table and hits the floor. Is work done? Why?​

Physics
2 answers:
morpeh [17]2 years ago
6 0

<u>Yes, work is done when a book falls of the table.</u>

This is because:

When the book falls, it's potential energy is converted into kinetic energy.   As it reaches the floor down, this kinetic energy is converted to heat energy and sound energy due to the impact.

When a force is imposed on an object to cause displacement of that object, work is done on that object. For a force to do work on an object, there should be a displacement and this force should cause the displacement. So here, since the book falls from the table and causes the displacement of the book from the table to the floor. It is said that work is done.

Work can be given by the formula:

W = F • d

where F is the force and d is the displacement.

prohojiy [21]2 years ago
6 0

Answer:

potential energy

Explanation:

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5.5 × 10-2 hertz

Explanation:

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What factor affects sensation
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D physiological condition

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Josie ran at an average speed of 16 m/s. if her mass 10 kg, what was her kinetic energy as she crosses her finish line?
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A solid steel column is 4.0 m long and 0.20 m in diameter. Young's modulus for this steel is 2.0 × 1011 N/m2. By what distance d
zzz [600]

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3.12 x 10^-5 m

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radius = half of diameter = 0.1 m

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F = 5000 x 9.8 = 49000 N

Area of crossection of cable,

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Let ΔL be the shrink in length of cable, then by the formula of Young's modulus

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Thus, the shrink in the length of cable is 3.12 x 10^-5 m.

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