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oksian1 [2.3K]
1 year ago
7

11. Amy is in a car that is moving at a speed of 50 kilometers/hour. If she moves a total distance of

Physics
1 answer:
lukranit [14]1 year ago
7 0
4 hours and 36minutes
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Mary and her younger brother Alex decide to ride the carousel at the State Fair. Mary sits on one of the horses in the outer sec
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Mary and her younger brother Alex decide to ride the carousel at the State Fair, Mary's and Alex's  angular speed M and tangential speed vM is mathematically given as

Mary's and Alex's  angular speed=1.43

Tangential speed mary=3.22 m/s

Tangential speed alex =2.260m/s

<h3>What is Mary's and Alex's angular speed M and tangential speed vM?</h3>

Generally, the equation for angular speed is mathematically given as

w=2\pi /T\\\\Therefore\\\\w=2\pi/3.9

w = 1.61 rev/see 3.9

Centripetal acc mary = v^2/r

Centripetal acc mary  = w^2r

Centripetal acc mary = w^2x 2m

Centripetal acc. of Alex = w²x L.u

Therefore

\frac{(ac) mary }{(ac) plex}= 1.43

Hence

tang. speed V=Wr

tang. speed of mary = 1.61x2 = 3.22 m/s

tang. speed of Alex: 1.61X1·4 =2.260m/s

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8 0
1 year ago
Would it be better to collide head-on with an identical car traveling at the same speed or collide with a stationary brick wall?
attashe74 [19]
It makes no difference. The momentum of either car goes to zero in both cases.
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In moving out of a dormitory at the end of the semester, a student does 1.82 x 104 J of work. In the process, his internal energ
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Answer:

Explanation:

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(c) According to the first law of thermodynamics  

Q = W + U

Q = 1.82 x 10^4 - 4.07 x 10^4

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How much power is generated by doing 500 j of work in 30 seconds
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Power is energy/time where energy is in joules and time is in seconds. The units for power is watts, W.

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The answer choice is 32
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2 years ago
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