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Rasek [7]
3 years ago
12

The velocity of a ball is thrown up is 20 meters/second. It attains zero velocity after 3.5 seconds. What is the average acceler

ation of the ball during its upward flight?
Mathematics
2 answers:
Reptile [31]3 years ago
7 0
Average acceleration: ( v - v o ) / Δ t
v = 0 m/s,  v o = 20 m/s,  Δ t = 3.5 s
a (average) = ( 0 m/s - 20 m/s )/3.5 s = - 20 m/s / 3.5 s =
 = - 5.7142857 m/s² ≈ - 5.71 m/s²
77julia77 [94]3 years ago
7 0

Answer:

Acceleration = 5.714 meter per second²

Step-by-step explanation:

A ball has been thrown up with a speed of 20 meters per second.

After 3.5 seconds speed of the ball become zero that means ball attains it's maximum height after 3.5 seconds.

Now we have to calculate the average acceleration during the upward motion.

Since, \text{Acceleration}=\frac{\text{Change in velocity}}{\text{Duration of motion}}

Acceleration = \frac{20-0}{3.5}

                     = 5.714 meter per second²

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ArbitrLikvidat [17]

Answer:52 ft.

Step-by-step explanation: If the area of the base of the pyramid is

169

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then each side of the base is

13

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Length of the side,

s

=

√

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=

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Iif we take the area of a square

A

=

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we get the area of the base to be

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thus proving that each side of the base is

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So to find the perimeter of the base of the pyramid we use the formula:

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and thus,

p

=

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⋅

13

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=

52

ft

7 0
3 years ago
Two numerical patterns are shown below:
svet-max [94.6K]

Answer:

Each term in Pattern A is one half the corresponding term in Pattern B.

Step-by-step explanation:

6 is half of 12 , 12 half 24, 18 half of 36, 24 half of 48 , 30 half of 60 etc.

8 0
2 years ago
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You roll a pair of fair dice until you roll “doubles” (i.e., both dice are the same). what is the expected number, e[n], of roll
bonufazy [111]

We need to define our outcomes and events.

 

Finding the probability<span> of each event occurring separately, and then multiplying the probabilities is the step to <span>finding  the probability</span> of two independent events that occur in sequence.

</span>

<span>
To solve this problem, we take note of this:</span>

 

The roll of the two dice are denoted by the pair

(I, j) ∈ S={ (1, 1),(1, 2),..., (6,6) }

Each pair is an outcome. There are 36 pairs and each has probability 1/36. The event “doubles” is { (1, 1),(2, 2)(6, 6) } has probability p= 6/36 = 1/6. If we define ”doubles” as a successful roll, the number of rolls N until we observe doubles is a geometric (p) random variable and has expected value E[N] = 1/p = 6.

3 0
3 years ago
Someone help please.
malfutka [58]

Answer:

$27

Step-by-step explanation:

If the table was marked up 125%, you can find the retail price of it this way:

20 + 1.25(20) = retail price

$45 = retail price.

To find 40% off of that, use

$45 - .4($45) = sale price

$27 = sale price (aka discount price)

5 0
3 years ago
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Hoochie [10]

Answer:

All integers from 2 to six inclusiv

Step-by-step explanation:

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3 years ago
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