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elena55 [62]
2 years ago
14

A slanted surface used to raise an object is a(n)​

Physics
1 answer:
Dmitriy789 [7]2 years ago
7 0

Answer:

Inclined Plane

Explanation:

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Friction provides the force needed for a car to travel around a flat, circular race track. What is the maximum speed at which a
blagie [28]

Answer:

The maximum speed at which the car can safety travel around the track is 18.6m/s.

Explanation:

Since the car is in circular motion, there has to be a centripetal force F_c. In this case, the only force that applies for that is the static frictional force f_sbetween the tires and the track. Then, we can write that:

f_s=F_c

And since f_s\leq \mu N and F_c=\frac{mv^{2}}{r}, we have:

\mu N\geq \frac{mv^{2}}{r}

Now, if we write the vertical equation of motion of the car (in which there are only the weight and the normal force), we obtain:

N-mg=0\\\\\\implies N=mg

Substituting this expression for N and solving for v, we get:

\mu mg\geq \frac{mv^{2}}{r}\\\\v\leq \sqrt{\mu gr}

Finally, plugging in the given values for the coefficient of friction and the radius of the track, we have:

v\leq \sqrt{(0.42)(9.81m/s^{2})(84.0m)}\\\\v\leq 18.6m/s

It means that in its maximum value, the speed of the car is equal to 18.6m/s.

7 0
3 years ago
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Mechanical waves are created when a source of energy causes a medium to ?
garik1379 [7]
<span>A mechanical wave is created when a source of energy causes a vibration to travel through a medium 

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3 0
3 years ago
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Which is a product of nuclear fusion?
Tju [1.3M]

Answer:

Creation of energy by joining the nuclei of two hydrogen atoms to form helium

7 0
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What is the farthest distance at which a typical "nearsighted" frog can see clearly in air?
Umnica [9.8K]

Answer: the correct option is D (17m).

Explanation: The farthest distance at which a typical "nearsighted" frog can see clearly in air is 17m.

7 0
3 years ago
An airplane flies a distance of 650 km at an average speed of 300km/h. how much time did the flight last
Butoxors [25]
X = v * t
650 = 300 * t
t = 2.16
4 0
3 years ago
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