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vlabodo [156]
3 years ago
15

A runner having mass of 55 kg moving at a speed of 9 m/s rounds a bend with a radius of 18 m. What is the centripetal

Physics
1 answer:
nikklg [1K]3 years ago
7 0

Answer:

centripetal acceleration = 4.5 m/s^2 ; centripetal force = 247.5 N

Explanation:

centripetal acceleration  = v^2 / r = 9^2 / 18 = 4.5 m/s^2

centripetal force = mv^2 / r = 4.5 x 55 = 247.5 N

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The force on the spring is F0 and it stores elastic potential energy PEs0. If the spring displacement is tripled to 3x0, determi
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Answer:

Explanation:

Let initial extension in the spring= x₀

Force on the spring = F₀

Let spring constant = k

Fo = k x₀

Fn = 3k x₀

Fn /Fo = 3

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PEsn ( NEW)  =1/2 k (3x₀)²

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Is a Joule the same as a Kelvin?
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Sergio039 [100]

Answer:

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3 years ago
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A 250 g block of ice is removed from the refrigerator at -8.0°C. How much thermal energy does the ice absorb as it warms to room
zlopas [31]

Answer:

Q = 114895 J

Explanation:

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Q=mc(T_2-T_1)+H_f\ m

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By replacing the values of the parameters you have:

Q=(0.250kg)(4186J/kg\°C)(22+8)\°C+(3.34*10^5 J/kg)(0.250kg)\\\\Q=114895\ J

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3 years ago
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