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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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A giraffe can run 40 meters per second what is its speed in miles per hour
lora16 [44]
Bearing in mind that, there are

60 seconds in 1 minute,
60 minutes in 1 hr,
1000 meters in 1 km,
and 1.609 km in 1 mile

\bf \cfrac{40\underline{m}}{\underline{s}}\cdot \cfrac{60\underline{s}}{\underline{min}}\cdot \cfrac{60\underline{min}}{hr}\cdot \cfrac{\underline{km}}{1000\underline{m}}\cdot \cfrac{mi}{1.609\underline{km}}\implies \cfrac{40\cdot 60\cdot 60\cdot  mi}{hr\cdot 1000\cdot 1.609}
\\\\\\
\cfrac{144000mi}{1609hr}\approx 89.496581\frac{mi}{hr}
6 0
3 years ago
Y = –2x + 30<br> y = 4x<br> Plz help
kati45 [8]

Answer: x=5

Step-by-step explanation:

Step 1:-

Given equations are y=-2 x+30........(1)

   another equation is y=4 x ..........(2)

Step 2:-

solving these two equations (1) and (2)

Equating both equations are  4 x = -2 x+30

4 x+2 x =30

6 x =30

Step 3:-

The final answer is x=5

                                                 

5 0
3 years ago
Given that f(x) =<br> X + 3<br> 2 <br> a) Find f(2)<br> b) Find f'(x)<br> c) Find f"(12)
joja [24]

Answer:

Step-by-step explanation:

Unclear.  Did you mean f(x) = 2^(x + 3)?  If so, the parentheses are mandatory.

Assuming that f(x) = 2^(x + 3) is correct, then:

a) f(2) = 2^(2 + 3) = 2^5 = 32

b) f'(x) = 2^(x + 3)*(x + 3)' = 2^(x + 3)(1) = 2^(x + 3)

c) f"(x) = 2^(x + 3) (same as in (b)), so that:

   f"(12) = 2^15

8 0
3 years ago
0.07 divided by 6.65
Kipish [7]

Answer:

0.01052

Step-by-step explanation:

It would take me a million years to show you how to solve it but its long division

8 0
3 years ago
Read 2 more answers
What is the value of x?
Dimas [21]
X/10 = 10/4x
4x^2  = 100
  x^2 = 25
     x = 5

answer
5 units
4 0
3 years ago
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