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cestrela7 [59]
4 years ago
10

What is the average speed if a boy jogs 250 meters in 110 seconds

Physics
1 answer:
Debora [2.8K]4 years ago
8 0

Answer:

2.27\frac{m}{s}

Explanation:

The average speed is given by the formula: \frac{distance}{time}

The distance covered is 250m , and the time is 110s.

Replacing in the formula: speed_{avg} = \frac{250 m}{110s}

Resulting in : speed_{avg} = 2.27 \frac{m}{s}.

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Positive feedback interactions in earth’s systems are always a result of human action. T/F
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3 years ago
A 1.0 meter long rod is held horizontally in the east-west direction on a distant planet and is dropped from a height of 1.23 m.
enyata [817]

Answer:

The induced emf between two end is 34.02 \times 10^{-5} V

Explanation:

Given:

Length of rod l = 1 m

Height h = 1.23 m

Magnetic field B = 6.93 \times 10^{-5} T

For finding induced emf,

  \epsilon = Blv

Where v = velocity of rod,

For finding the velocity of rod.

From kinematics equation,

 v^{2} = v_{o} ^{2} + 2gh

Where v_{o} = initial velocity, g = 9.8 \frac{m}{s^{2} }

   v = \sqrt{2gh}

   v = \sqrt{2 \times 9.8 \times 1.23}

   v = 4.91 \frac{m}{s}

Put the velocity in above equation,

   \epsilon = 6.93 \times 10^{-5} \times 1 \times 4.91

   \epsilon = 34.02 \times 10^{-5} V

Therefore, the induced emf between two end is 34.02 \times 10^{-5} V

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3 years ago
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