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4 years ago

What is the speed of a bobsled whose distance-time graph indicates that it traveled 116m in 29s?

Physics

2 answers:

ryzh [129]4 years ago

5 0

Speed = Distance ÷ Time
Speed = 116 ÷ 29
Speed = 4

mars1129 [50]4 years ago

5 0

Speed = (distance covered) / (time to cover the distance)

= (116 meters) / (29 seconds)

= (116/29) (meters per second)

= 4 meters per second (4 m/s)

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2 years ago

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A series RLC circuit is driven by a 1.0-kHz oscillator. The circuit parameters are Vms = 12 V, L = 5.0 mH, C= 4.0 uF, and R=102.

alexgriva [62]

Answer:

C) $12.3$ volts

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f = frequency of oscillator = 1 kHz = 1000 Hz

$V_{rms}$ = 12 Volts

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$X_{L}$ = Inductive reactance

Inductive reactance is given as

$X_{L}$ = $2\pi fL$

$X_{L}$ = $2(3.14) (1000)(0.005)$

$X_{L} = 31.4$

$X_{C}$ = Capacitive reactance

Capacitive reactance is given as

$X_{C}=\frac{1}{2\pi fC}$

$X_{C}=\frac{1}{2(3.14)(1000)(4\times 10^{-6})}$

$X_{C} = 39.8$

Impedance of the circuit is given as

$z = \sqrt{R^{2}+(X_{L} - X_{C})^{2}}$

$z = \sqrt{102^{2}+(31.4 - 39.8)^{2}}$

$z = 102.35$

Rms Current flowing is given as

$i = \frac{V_{rms}}{z}$

$i = \frac{12}{102.35}$

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Rms potential difference across the resistor is given as

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3 years ago

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3 years ago

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Answer:

72.324 J

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GPE = mgh.

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h = height

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m = 4.1 kg

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3 years ago