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patriot [66]
3 years ago
9

Tom has built a large slingshot, but it is not working quite right. He thinks he can model the slingshot like an ideal spring, w

ith a spring constant of 45.0 N/m. When he pulls the slingshot back 0.515 m from a non-stretched position, it just doesn't launch its payload as far as he wants. His physics professor "helps" by telling him to aim for an elastic potential energy of 14.5 Joules. Tom decides he just needs elastic bands with a higher spring constant. By what factor does Tom need to increase the spring constant to hit his potential energy goal?
During a followup conversation, Tom's physics professor suggests that he should leave the slingshot alone and try pulling the slingshot back further without changing the spring constant. How many times further than before must Tom pull the slingshot back to hit the potential energy goal with the original spring constant?
Physics
1 answer:
lora16 [44]3 years ago
4 0
I don’t know right now, but I’ll get back to you later this afternoon in comment
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lozanna [386]

Answer:

2.655\times 10^{13}\ photons

Explanation:

Area of the solar sail = A = 30 m2

Solar constant = I = 1388 W/m2

Planck's constant = h = 6.626 × 10⁻³⁴ m²kg/s

Speed of light = c = 3×10⁸ m/s

Wavelength of light = \lambda = 570 nm

Pressure from radiation

P=2\frac{I}{c}\\\Rightarrow P=2\frac{1388}{3\times 10^8}\\\Rightarrow P=9.253\times 10^{-6}\ W

Energy of a photon

E=\frac{hc}{\lambda}\\\Rightarrow E=\frac{6.626\times 10^{-34}\times 3\times 10^8}{570\times 10^{-9}}\\\Rightarrow E=3.487\times 10^{-19}\ J

Number of photons

n=\frac{P}{E}\\\Rightarrow n=\frac{9.253\times 10^{-6}}{3.487\times 10^{-19}}\\\Rightarrow n=2.655\times 10^{13}\ photons

Number of photons is 2.655\times 10^{13}\ photons

3 0
3 years ago
How much work is done on a small car if a 3150 N force is exerted to move it 75.5 m to the side of the road
irinina [24]

Answer:

Explanation:

Work = Force times displacement. Therefore,

W = 3150(75.5) so

W = 238000 N*m

6 0
2 years ago
A bird is flying north with a mass of 2.5kg has a momentum of 17.5kg m/s at what velocity is it flying
klasskru [66]
Momentum = mass • velocity
v= 17.5/2.5
= 7 m/s
8 0
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Answer:

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sukhopar [10]

Answer:

Mass and height

Explanation:

Gravitational potential energy is energy an object possesses because of its position in a gravitational field. The most common use of gravitational potential energy is for an object near the surface of the Earth where the gravitational acceleration can be assumed to be constant at about 9.8 m/s2.

Which is represented as;

PE_g=mgh

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Here we see that mass of object and height is directly proportional to the gravitational potential energy.

That means increasing in mass and height will result in increasing gravitational potential energy.

7 0
2 years ago
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