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melisa1 [442]
3 years ago
13

John attached a ball to a spring

Physics
1 answer:
chubhunter [2.5K]3 years ago
8 0

Answer:

C down

Explanation:

The ball is pulling the spring down so this must be the direction of the force

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B) A skilled jet fighter flies a stunt plane in a vertical circle of 1200 ft
adell [148]

The jet fighter's acceleration at the highest point is 17.56 ft/s²

The jet fighter's acceleration at the lowest point is 35.12 ft/s²

The given parameters;

radius of the circular path, r = 1200 ft

constant velocity, v = 140 mi/h = 205.3 ft/s

The formula for centripetal acceleration in a circular path is given as;

a_c = \frac{v^2}{r}

The jet fighter's acceleration at the highest point is calculated as;

h = 2r = 2 x 1200 ft = 2,400 ft

a_c = \frac{v^2}{r} \\\\a_c = \frac{(205.3)^2}{2400} \\\\a_c = 17.56 \ ft/s^2

The jet fighter's acceleration at the lowest point is calculated as;

h = r = 1,200 ft

a_c = \frac{v^2}{r} \\\\a_c = \frac{(205.3)^2}{1200} \\\\a_c = 35.12\ ft/s^2

Learn more here:brainly.com/question/11700262

6 0
3 years ago
What would happen if you were to put both hands in the water with an electric eel?
scoray [572]
In my opinion I would say u would electrocute
4 0
3 years ago
Read 2 more answers
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

Diameter of the wagon, d = 0.5 m

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.

4 0
4 years ago
Help with Physical Science! I have to do this discussion on potential and kinetic energy. The example of the problem is a 4 poun
algol [13]

Answer:

Tying a 4 weight pound on a string is a potential energy because it is at rest but cutting it and letting it fall experiences a kinetic energy because it will be in motion.

8 0
4 years ago
How many protons does a fluortine atom have
Georgia [21]

i think the answer is 9.

6 0
3 years ago
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