Answer:
15x6=90 meters
Explanation:
i did 15x6 because it runs 15 meters per second
brainliest? >w<
Answer:
1. MA = 4
2. MA = 2
3. MA = 6.5
4. MA = 7
5. MA = 1.8
Effort = 152.78 N
Weight = 90 N
Explanation:
The mechanical advantage of a lever is given as:
Mechanical Advantage = MA = Effort Arm/Resistance Arm
1.
MA = 12 m/3 m
<u>MA = 4</u>
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2.
MA = 2 ft/1 ft
<u>MA = 2</u>
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3.
MA = 26 cm/ 4 cm
<u>MA = 6.5</u>
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4.
Since the resistance arm is 0.5 m and the total board length is 4 m.
Therefore:
Effort Arm = 4 m - 0.5 m = 3.5 m
MA = 3.5 m/0.5 m
<u>MA = 7</u>
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5.
Effort Arm = 4.5 m
Resistance Arm = 2.5 m
MA = 4.5 m/2.5 m
<u>MA = 1.8</u>
Another formula for mechanical advantage is:
MA = Weight/Effort
here,
Weight = 275 N
Effort = ?
Therefore,
1.8 = 275 N/ Effort
Effort = 275 N/1.8
<u>Effort = 152.78 N</u>
To lift a wooden board a 50 N force is applied. Therefore,
1.8 = Weight/50 N
Weight = 50 N * 1.8
<u>Weight = 90 N</u>
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Destructive Interference. An example of destructive interference is noise canceling headphones. Noise canceling headphones work by using a microphone to pick up the frequencies of incoming waves. The headphone then sends out a wave that is the exact opposite, canceling out the sound.