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krok68 [10]
4 years ago
12

A ___ is a machine which contains a lever and wedge that combine to make work easier.

Physics
2 answers:
gladu [14]4 years ago
4 0

Don't be fooled ! The answer is a pair of scissor. I got it wrong because I put screw driver.

Pani-rosa [81]4 years ago
4 0

Explanation :

The machines that makes our work easier are termed as simple machines. For examples wheel and axle, lever, wedge etc.

The machines that are made up of simple machines are called compound machines.

A <u>stapler</u> is a machine which contains a lever and wedge that combine to make work easier. It is one of the compound machines. The topmost part of the arm of the stapler is a lever. When it punches a paper it becomes a wedge (fig).

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An Airbus A320 jetliner has a takeoff mass of 75,000 kg. It reaches its takeoff speed of 82 m/s (180 mph) in 35 s. What is the t
timofeeve [1]

Answer:

175.5 kN

Explanation:

We find the acceleration of the Airbus A320 jetliner from,

a = (v - u)/t where u = initial velocity of jetliner = 0 m/s (since it starts from rest), v = final velocity of jetliner = 82 m/s and t = time for velocity change = 35 s

So a = (v - u)/t = (82 m/s - 0 m/s)/35 s = 82 m/s ÷ 35 s = 2.34 m/s²

Now, the thrust of the engines on the jetliner T = ma where m = mass of jetliner = 75,000 kg and a = acceleration of jetliner = 2.34 m/s²

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= 175.5 kN

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3 years ago
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salantis [7]

We have that the speed over the ground of a mosquito flying 2 m/s relative to the air against a 2 m/s headwind is

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