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Sindrei [870]
3 years ago
14

When an object has a net force of zero, then it is said to be in what?

Physics
1 answer:
Ganezh [65]3 years ago
3 0

Answer: the object is said to be in a state of rest or uniform motion in a straight line

Explanation:Newton's first law of motion

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Answer:

An atomic Nucleus

Explanation:

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A falling object accelerates from -10.0 m/s to -30.0 m/s. how much time does it take?
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Answer:

2.04 s

Explanation:

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A 0.5 m diameter wagon wheel consists of a thin rim having a mass of 7 kg and six spokes, each with a mass of 1.2 kg. 1.2 kg 7 k
Arte-miy333 [17]

Explanation:

It is given that,

Mass of the rim of wheel, m₁ = 7 kg

Mass of one spoke, m₂ = 1.2 kg

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Radius of the wagon, r = 0.25 m

Let I is the the moment of inertia of the wagon wheel for rotation about its axis.

We know that the moment of inertia of the ring is given by :

I_1=m_1r^2

I_1=7\times (0.25)^2=0.437\ kgm^2

The moment of inertia of the rod about one end is given by :

I_2=\dfrac{m_2l^2}{3}

l = r

I_2=\dfrac{m_2r^2}{3}

I_2=\dfrac{1.2\times (0.25)^2}{3}=0.025\ kgm^2

For 6 spokes, I_2=0.025\times 6=0.15\ kgm^2

So, the net moment of inertia of the wagon is :

I=I_1+I_2

I=0.437+0.15=0.587\ kgm^2

So, the moment of inertia of the wagon wheel for rotation about its axis is 0.587\ kgm^2. Hence, this is the required solution.

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The wavelength would be 410 m/s
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Which has greater kinetic energy, a car traveling at 40 mph or a half-as-massive car traveling at 80 mph?
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