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NikAS [45]
3 years ago
7

Explain how elastic force is used to shoot an arrow from a bow.

Physics
2 answers:
Hunter-Best [27]3 years ago
5 0

Answer:

The bow bends when the archer pulls back on the string. The bow can bend because it is made of an elastic material. ... Releasing the string thrusts the arrow forward with the elastic force of the bow. The elastic potential energy of the bow is converted to the kinetic energy of the arrow.2 Jan 2014

mash [69]3 years ago
5 0
God does it god knows man
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A dancer starts 3 meters from the curtain then moves 8 meters from the curtain in 15 seconds. What was his velocity?
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I am pretty sure it is either 45 or 0.2
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C

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You make a(n) _____ by fastening together usually perpendicular parts with the ends cut at an angle.
nadezda [96]

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3 years ago
Your roommate is working on his bicycle and has the bike upside down. He spins the 60 cm
tigry1 [53]
Diameter = 60 cm, Radius = 60/2 = 30 cm = 30/100 = 0.3 m.

The pebble in the tread goes by 3 times every second.

This is the same as 3 times per second.

Recall the unit of frequency is Hertz or per second, s⁻¹

So 3 times per second, Frequency, f = 3s⁻¹ or 3 Hertz

For angular motion:

Angular speed, ω = 2πf

                         = 2*π*3

                         = 6π   rad/s

Linear speed, v = ωr =  6π * 0.3 = 1.8π m/s


Linear acceleration, a = v² / r

                               a = 1.8π * 1.8π / 0.3 = 10.8π²   m/s²

Angular acceleration α = a/r  = 10.8π² / 0.3 = 36π² rad/s²


Angular speed = 6π rad/s ≈ 18.840 rad/s

The linear speed of the pebble = 1.8π  m/s ≈ 5.655 m/s

The angular acceleration = 36π² rad/s² ≈ 355.306 rad/s²

The linear acceleration of the pebble = 10.8π²  m/s ≈ 106.592 m/s²
5 0
3 years ago
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