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Juli2301 [7.4K]
3 years ago
12

A steel safe with mass M falls onto a concrete floor. Just before hitting the floor, its speed is vi . It hits the floor without

rebounding, and ends up being d shorter than before. Find the magnitude of the (average) force exerted by the floor on the safe while it is being deformed. You can assume this force is a constant during the short time it takes for the safe to deform. Ignore the effects of gravity.
Physics
1 answer:
marusya05 [52]3 years ago
7 0

Answer:

Explanation:

initial velocity, u = vi

final velocity, v = 0

distance = d

mass of safe = M

Use third equation of motion

v² = u² + 2as

0 = vi² - 2 ad

a = vi²/2d

Force, F = mass x acceleration

F = M x vi²/2d

F = Mvi²/2d

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Sound vibrations travel in a wave pattern, and we call these vibrations sound waves. Sound waves move by vibrating objects and these objects vibrate other surrounding objects, carrying the sound along. ... Sound can move through the air, water, or solids, as long as there are particles to bounce off of.

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decreased 5 times

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a man crossed a road 8.25m wide at a speed of 2.01m/s,how long does it take to get man to cross the road​
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t = 4.1 seconds

Explanation:

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Width of road which is to be crossed by a man is 8.25 m, it means it is distance to be covered.

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v=\dfrac{d}{t}

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So, the time taken by the man to cross the road is 4.1 seconds.

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3 years ago
A brother and sister are standing next to each other at rest on a surface of frictionless ice. The brother’s mass is exactly twi
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The sister suddenly pushes her brother. As a result, the sister moves with kinetic energy k. The resulting kinetic energy of the brother is k/2.

<h3>What is kinetic energy?</h3>

The ability of an object to do work by virtue of its motion is called the kinetic energy.

A brother and sister are standing next to each other at rest on a surface of frictionless ice. The brother’s mass is exactly twice that of his sister’s.

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The kinetic energy of sister is k =1/2 mv²,

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Thus, the resulting kinetic energy of the brother is k/2.

Learn more about kinetic energy.

brainly.com/question/12669551

#SPJ4

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