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2 years ago

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Newtons first law stateS that object will move With a constant velocity if nothing acts on it. Does our every day experience con

tradict one of newtons law ? Explain

1 answer:

bazaltina [42]2 years ago

4 0

Answer:

hi

Explanation:

hi

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On a planet where g = 10.0 m/s2 and air resistance is negligible, a sled is at rest on a rough inclined hill rising at 30°. The

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Answer:

Explanation:

a is the acceleration

μ is the coefficient of friction

Acceleration of the object is given by

$a = g (\sin \theta -\mu \cos \theta)\\\\=10( \sin 30 - 0.4 \cos 30)\\\\=10(0.5-0.3464)\\\\=1.54m/s^2$

Velocity at the bottom

$v^2=u^2+2as\\\\u=0\\\\v^2=2as\\\\=2*1.54*8\\\\=24.576\\\\v=4.96m/s$

after travelling 4m , its velocity becomes 0

$a=\frac{v^2-u^2}{2s}$

$a=\frac{0-u^2}{2s}$

$a=\frac{-(-4.96)^2}{2*4} \\\\=-3.075m/s^2$

Coefficient of kinetic friction

μ = F/N

$=\frac{ma}{mg} \\\\=\frac{3.075}{10} \\\\=0.31$

Therefore, the Coefficient of kinetic friction is 0.31

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A large mass has (less or more) mass energy than a smaller mass at the same temperature?

Alexeev081 [22]

Answer:

more I guess

Explanation:

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3 years ago

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Why is density used to determine the identity of matter?

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a substance's density is the same at a certain pressure and temperature, and the density of one substance is usually different than another substance.

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On a playground slide, a child has potential energy that decreases by 1000 J while her kinetic energy increases by 900 J. what o

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Friction 100 j

Explanation:

Friction causes the inequality between PE and KE

100 J

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If a light ray from a candle strikes a mirror at an angle of 40° with the normal, at what angle will the ray reflect?

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the correct answer is b: 25

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