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lara [203]
3 years ago
15

In a shopping mall, two elevators pass each other moving in opposite directions. Each elevator is moving at the same speed. The

relative velocity of one elevator to the other is 10 m/s. What is the velocity of each elevator relative to a person standing on the ground?

Mathematics
2 answers:
STALIN [3.7K]3 years ago
6 0

Problem 5

Say Up is positive. When the up elevator sees the separation increasing at a speed of 10 m/s it means that you have +5 - - 5 true to the observer below. He sees each of them moving at the same speed away from one another. Answer A.

Problem 6

6 looks right to me. A timer would be the second best answer but it starts at 0. Answer C

Problem 7

It can't be zero. Nothing would get anywhere if it was zero. When you look up and see a plane, isn't it going in the direction you think it's going? It can't appear to be going west. That would take it to Vietnam or Melbourne. It must be flying east when seen flying from ground level and since we are not asked to consider air resistance or the earth's rotation, the answer must be D.

Problem 8

I'll go with your definition.

Problem 9

It's moving forward as well, just not as quickly. 126 - 68 = 58 m/s if 126 is taken as positive. Answer D

Nata [24]3 years ago
5 0
Since both have same speed
v(rel.) x-(-x)= 10( from law of vector addition)
2x=10,x= 5m/sec
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1 year ago
1.A rectangle is 6 inches longer than its wide.Write and simply an expression for the perimeter of the rectangle.
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5 0
2 years ago
Help please i dont get it
ale4655 [162]

Answer:

  (c)  x = 2 and x = -8

Step-by-step explanation:

The rules of logarithms let you rewrite this as a quadratic equation. That equation will have two (2) potential solutions. We know from the domain of the log function that any negative value of x will be an extraneous solution.

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The rules of logarithms that apply are ...

  \log(a)+\log(b)=\log(ab)\qquad\text{all logarithms to the same base}\\\\\log_b(a)=c\ \Longleftrightarrow\ b^c=a\\\\

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<h3>take antilogs</h3>

We can rewrite the equation so that only one logarithm is involved. Then we can take antilogs.

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<h3>solve the quadratic</h3>

Adding (6/2)² = 9 to both sides will "complete the square."

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8 0
1 year ago
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1 - 2/3 = ? Pls help me i don’t know what this means
ElenaW [278]

Answer:

1/3

Step-by-step explanation:

Simplify the following:

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3/3 - 2/3 = (3 - 2)/3:

(3 - 2)/3

3 - 2 = 1:

Answer:  1/3

3 0
3 years ago
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