1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kupik [55]
3 years ago
13

V2=u2+2as v 2 = u 2 + 2 a s Where v v is the final velocity (in m/s), u u is the initial velocity (in m/s), a a is the accelerat

ion (in m/s²) and s s is the distance (in meters). Find v v when u u is 9 m/s, a a is 7 m/s², and s s is 28 meters.
Mathematics
1 answer:
allsm [11]3 years ago
5 0

Answer:

<em>Final velocity, v = 21.75 m/s</em>

Step-by-step explanation:

Given that the relation between final velocity, initial velocity, acceleration and distance traveled is expressed as:

v^2=u^2+2as

Also, given that:

Initial velocity, u = 9 m/s

Acceleration, a = 7 m/s^2

Distance, s = 28 m

To find:

Final velocity, v = ?

Solution:

The given relation between v, u, a and s is:

v^2=u^2+2as

We have the values of initial velocity, acceleration and distance traveled in the question statement. We just need to put all these values to find the value of final velocity.

Let us put all the values in the given equation and try to find final velocity, v:

v^2=9^2+2\times 7 \times 28\\\Rightarrow v^2=81+14 \times 28\\\Rightarrow v^2=81+392\\\Rightarrow v^2=473\\\Rightarrow v=\sqrt{473}\\\Rightarrow v=21.75\ m/s

So, the answer is:

<em>final velocity, v = 21.75 m/s</em>

You might be interested in
Find the measures of the labeled angles
Andrei [34K]

Answer:

135 degrees \

Step-by-step explanation:

5x= x+108

Subtract x from the right

4x= 108

divide by 4

x= 27

Substitute for x in the original equation

(x+108)

(27)+(108)

= 135 degrees

4 0
3 years ago
A mother is 1 3/4 times as tall as her son. Her son is 3 feet tall. How tall is the mother?
Kobotan [32]
In order to find the answer to this question, you need to multiply the fractions. But before we do that, we need to turn the mixed fraction into a proper fraction. 1 3/4 would turn into 7/4 because you multiply the denominator by the whole number and add the numerator. So we come out with:

7/4 x 3/1 = 21/4

Can we simplify 21/4? No, we can't. However, we need to turn it back into a mixed fraction. We can do that by actually dividing the numbers. 21 divided by 4 is 5 with a remainder of 1, so we come out with our answer.

The mom is 5 1/4 feet tall :) Hope this helps!
3 0
3 years ago
Sallie Woo worked these hours last week: Monday, 10; Tuesday, 8 1/4; Wednesday, 9 1/2; Thursday, 6; Friday, 8; Saturday, 5. Sall
almond37 [142]

Answer:

Her pay for the week= $ 611.325

Step-by-step explanation:

Sallie is paid $ 11.40 per hour for regular hours.

The total regular hours worked during the week are

Monday + Tuesday + Wednesday + Thursday+ friday = 8 + 8+ 8+6+8= 38 hours

She works overtime during the week

Monday + Tuesday + Wednesday = 2+ 1/4+  1 1/2=  2+ 1/4 + 3/2

= 8 +1+ 6/4=15/4 = 3 3/4 hours

Over the weekend she works five hours .

So the total pay would be

$ 11.40( 38 ) + $ 11.40( 1.5) (  15/4) + $ 11.40 ( 2) ( 5)

= 433.2 + 64.125 + 114.0

= $ 611.325

3 0
3 years ago
Which of the following is the equation of the one that passes through the point
Diano4ka-milaya [45]

Answer:

C

Step-by-step explanation:

the answer is C

( -6 , 1 )

y = -1/2x - 2

if x = -6

y = -1/2(-6) - 2

y = 3 - 2

y = 1

7 0
2 years ago
Consider this function: f(x) = -4x + 7. Which polynomial is equivalent to f(f(x))? A. 16x – 28 B. 16x2 – 56x + 49 C. 16x – 21 D.
Temka [501]

Answer:

The answer is :

C. 16x - 21

5 0
2 years ago
Other questions:
  • HURRY PLEASE HELP ME? <br> WiLL GIvE brainliest.
    9·1 answer
  • In 150 spins, about how often do you expect to less than 6?
    11·1 answer
  • Accounts Payable 420 Accounts Receivable 3,200 Capital Stock 240 Cash 100 Cost of Goods Sold 600 Inventory 380 Long-term Debt 4,
    9·1 answer
  • Subtract −b+3 ​​from −11b−4 ​
    8·2 answers
  • What is the total cost of $16 if you include 5% GST and 20% tip​
    15·1 answer
  • The population of a town increased from 5,600 to 6,300 people. What was the percent of increase?
    7·2 answers
  • Which graph does NOT represent a function?<br> A)<br> A<br> B)<br> B<br> C)<br> С<br> D)<br> D
    12·1 answer
  • A pair of jeans<br> Is $36.99 and they<br> are on sale for 20% off. What is the sale price?
    5·2 answers
  • Consider the number line of x &gt; 28 which numbers are solutions of the inequality
    7·1 answer
  • Maria counted the number of snowmen she saw each day what is the median number of the snowman 0 2 3 3 6 7 12
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!