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Blababa [14]
3 years ago
15

Match the term to the correct description.

Physics
1 answer:
Lelechka [254]3 years ago
7 0

1. Open circuit

2. Electricity
3. Circuit
4. Series circuit

5. Parallel circuit

6. Resistor

7. Closed circuit

8. switch


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A 75Kg man jumps from a window 1.0m above the sidewalk. If the man falls with his knees and ankles locked, the only cushion for
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Answer:

150153.06122 N

Explanation:

m = Mass of person = 75 kg

h = Height of fall = 1 m

g = Acceleration due to gravity = 9.81 m/s²

F = Force

s = Displacement = 0.49 cm

Potential energy is given by

P=mgh\\\Rightarrow P=75\times 9.81\times 1\\\Rightarrow P=735.75\ J

Work is given by

W=Fs\\\Rightarrow F=\frac{W}{s}\\\Rightarrow F=\frac{735.75}{0.0049}\\\Rightarrow F=150153.06122\ N

The average force exerted is 150153.06122 N

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At the train station, you notice a large horizontal spring at the end of the track where the train comes in. This is a safety de
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Assume a maximum stopping acceleration of g/2 where g is acceleration due to gravity.

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2.99 m/s

Explanation:

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Use third equation of motion:

v^2-u^2 = 2as

substitute the values to find the speed of train:

0 -u^2 = 2\times -4.9 \times 0.914 \\u^2=8.96 \\u=2.99 m/s

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