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Komok [63]
3 years ago
7

A crew of piano movers uses a 6.5-foot ramp to move a 990 lb Steinway concert grand up onto a stage that is 1.8 feet higher than

the floor. How far away from the base of the stage should they set the end of the ramp so that the other end exactly reaches the stage?
Physics
1 answer:
iVinArrow [24]3 years ago
5 0

Answer:

  • 6.2458 feet.

Explanation:

Lets call the point in which the end of the ramp touches the ground, point A.

Lets call the point of the base of the stage, point B

And lets call the point in which the ramp touches the stage, point C

If the ramp exactly reaches the stage, ABC forms a right triangle, being one cathetus AB, the other cathetus being BC, and being the hypothenuse CA

The length of AB its the distance between the end of the ramp and the base of the stage. This is the distance  we are looking for.

The length of BC its the height of the stage. This is 1.8 feet.

The length of CA its the length of the ramp, This is 6.5 feet.

Now, we can use the Pythagorean Theorem, this is:

(AB)^2 + (BC)^2 = (CA)^2

But, as we wanna to find AB, we can write

(AB)^2  = (CA)^2 - (BC)^2

AB  = \sqrt{(CA)^2 - (BC)^2}

Taking the values:

AB  = \sqrt{(6.5 \ ft)^2 - (1.8 \ ft)^2}

AB  = \sqrt{(6.5 \ ft)^2 - (1.8 \ ft)^2}

AB  = 6.2458 ft

And this is how far away the base must be.

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<em>Element C will be best for a nuclear fission reaction</em>

Explanation:

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2 years ago
Clara rushes 30m to a truck then turns and walks back. Total travel is 120s what is her average velocity?
navik [9.2K]

Taking into account the definition of velocity, Clara's average velocity is 0.5 m/s.

<h3>Definition of velocity</h3>

Velocity is a physical magnitude that relates the displacement of an object, the time it takes to make this change in position and direction. So it is considered a vector magnitude.

In other words, the velocity can be defined as the amount of space traveled per unit of time with which a body moves, considering the direction, and can be calculated using the expression:

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<h3>Average velocity of Clara</h3>

Clara rushes 30 m to a truck then turns and walks back. Total travel is 120s. Then, you know:

  • distance traveled= 30m rushing + 30m walking back= 60 m
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Replacing in the definition of velocity:

velocity= 60 m÷ 120 s

Solving:

<u><em>velocity= 0.5 m/s</em></u>

Finally, Clara's average velocity is 0.5 m/s.

Learn more about velocity:

brainly.com/question/4418301

brainly.com/question/24990123

brainly.com/question/14244558

brainly.com/question/25288184

#SPJ1

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Answer:

a

Explanation:

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