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MariettaO [177]
3 years ago
8

Please help i don't understand

Physics
1 answer:
IrinaVladis [17]3 years ago
3 0
The answer is C why because I know it is
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Urippe Went to start his lawnmower and was having trouble. At the same moment, Uwi was starting her identical lawnmower in the y
Ivan

Answer:

As each mower presumably needs the same torque to start, and torque is a product of force and moment arm, the longer moment arm of 10.42 cm on Uwi's mower means lower force is required when compared to Urippe's shorter moment arm of 1.35 cm

350 rev/min = 350(2π) / 60 = 36.652 rad/s

36.652 rad/s / 0.294 s = 124.66... <u>125 rad/s²</u>

a = αR = 125(0.1042) = 12.990... <u>13 m/s²</u>

a =  αR = 125(0.0135) = 1.68299... <u>1.7 m/s²</u>

I am GUESSING that we are supposed to model these mowers as a uniform disk

  τ = Iα

FR = (½mr²)α

  F = mr²α/2R

Urippe's pull  = (3.56)(0.2041²)(124.66) / (2(0.0135)) = 702.008... <u>702 N</u>

Usi's pull =        (3.56)(0.2041²)(124.66) / (2(0.1042)) = 90.9511...<u>91.0 N</u>

L = Iω = (½(3.56)(0.2041²))36.652 = 2.71771...<u>2.72 kg•m²/s  down</u>

using the right hand rule

8 0
2 years ago
How do you use vectors daily without realizing it was a vector?<br><br> I need help ASAP !!!
jonny [76]

Explanation:

Vectors are quantities that has both magnitude and direction. A vector is described in terms of quantity and the direction it is headed.

There are different forms of vectors that are used in our daily life.

  • When we describe the motion of a car and the direction it is heading, we are simply talking about its velocity which is a vector.
  • When we say James treks 2km from his school to the house everyday, we are simply describing his displacement.
  • When we apply a force to push the table from one corner of the room to another point, is simply a vector
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6 0
3 years ago
Wire A carries 4 A into a junction, wire B carries 5 A into the same junction, and another wire is connected to the junction. Wh
nydimaria [60]

Answer:9A

Explanation:

let the last wire be wire C

According to Kirchhoff's rule

the sum of all currents entering a junction must be equal to the sum of all currents leaving a junction

Ic=Ia+Ib

Ic= 4+5

Ic=9A

7 0
3 years ago
In an atomic model that includes a nucleus, negative charge is
NeX [460]
D). located out side the nucleus
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3 years ago
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Which statement BEST explains the model?
I am Lyosha [343]

Answer:

C

Explanation:

Ur welcome just took on test

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