Please help! Use the model to figure these out. Will mark brainliest if you answer both questions correctly.
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Related Questions
Barney was driving at 25 mph. A car pulls out 30 ft ahead of him. The coefficient of friction, f, is 0.7. Which statement is true? A Barney hits the car. B Barney stops less than a foot from the car. C Barney misses the car by 3 ft. D Barney's skid marks measure 23 ft.
Answers
Answer:
B Barney stops less than a foot from the car.
Step-by-step explanation:
From the information given:
The initial speed of barney [tex]v_o[/tex] = 25 mph
Coefficient of friction [tex]\mu[/tex] = 0.7
Recall that
1 mph = 0.447 m/s
Then
[tex]v_o[/tex] = 25 × 0.447 m/s
[tex]v_o[/tex] = 11.175 m/s
The force of friction acting on the barney is expressed as:
[tex]F = \mu N \\ \\ F = \mu mg[/tex]
[tex]ma = \mu mg[/tex]
[tex]a = \mu g[/tex]
a = 0.7 × 9.8 m/s
a = 6.86 m/s²
Since the force acts in an opposite direction to the motion of Barney, Thus the acceleration must also be negative.
a = -6.86 m/s²
Now;
Suppose Barney stops after traveling a distance (s), so that the final speed is zero.
Then;
Using the kinematic equation;
[tex]v^2 - v_o^2 = 2as[/tex]
[tex]0 - (11.17)^2 = 2 \times (-6.86) s[/tex]
[tex]-124.76 = -13.72 s[/tex]
[tex]s = \dfrac{124.76}{13.72}[/tex]
s = 9.09 m
Recall that;
1 m = 3.28 ft
So;
s = 9.09 m = 9.09 × 3.28 ft
s = 29.81 ft
∴
The distance traveled by the Barney is 29.81 ft which implies that Barney stops less than a foot from the car.
Simplify the expression distribute if necessary
4a + 7(2c - a)
Answers
Answer:
-3a + 14c
Step-by-step explanation:
4a+7(2c-a)
4a + 14c - 7a
-3a + 14c
Answer:
-3a + 14c
Step-by-step explanation:
4a + 7(2c - a)
4a + 14c - 7a <- Distribute
-3a + 14c <- Add like terms
A bus travels at a constant speed of 114 miles in 3 hours. How many miles does the bus travel in 1 hour?
A bus travels at a constant speed of 114 miles in 3 hours. How far does the bus travel in 4.5 hours?
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Put the following equation of a line into slope-intercept form, simplifying all
fractions.
4x + 3y = –21
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y= -4/3x -7
84 people attended
a play. Of the 84
students, 1/3 of
them were parents.
How many parents
were in the
audience?
Answers
Answer:
28 is the number of parents.
Step-by-step explanation:
84/3
Step-by-step explanation:
all audiences 84 people
parents = 1/3 of all 84 people
parents = 1/3 × 84 = 28 people
Please answer please will give brainliest
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Answer:
c
Step-by-step explanation:
5756645+456775(5667+567668)56+567[68655667-67767677]= ?
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the answer is, 14666074545975
Which is an equation?
A)17 + x
B)45➗ x
C) 20x = 200
D) 90- x
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Answer:
20X=200 because an equation contains LHS and RHS
SOME ONEEE PLZZ HELPP MEEEE
Answers
Answer:
2.5
Step-by-step explanation:
The minimum value is the minimum y-value a function includes. In this case, since you can see the function is periodic (it repeats itself periodically, hence periodic) and the smallest y-value the function encounters is 2.5 (doesn't go below this value), the minimum y-value is 2.5. I hope this made sense. If not, feel free to let me know.
Помогите пожалуйста срочно надо пожалкйста
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Answer:
Me??? :(
Step-by-step explanation:
What is the slope of the non-vertical lines?
m= ???
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The edge of two cubes are 8cm and 4cm respectively. Calculate the ratio of their surface area?
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area of each side: 8x8 = 64 cm2
surface area: 64x6 (a cube has 6 sides) = 384 cm2
surface area of cube with 4 cm edge:
area of each side: 4x4= 16 cm2
surface area: 16x6 = 96 cm2
Ratio : 96:384 = 1:4
hope it helps:)
Does anyone know the area?
Answers
Answer:
69
Step-by-step explanation:
4x3=12
9x5=45
2x6=12
45+12+12=69
What is the value of 8 in the number 33.086?
Answers
Answer:
The value of 8 in the number 33.086 would be the hundredth
Step-by-step explanation:
30 would be the ten
3 would be the one
.0 would be tenth
.8 is the hundredth
.6 is the thousandth
Answer:
hundredths
Step-by-step explanation:
0 is tenths
8 is hundredths
6 is thousandths
Help please urgent ppleeeaseeeeeeeeeee
Answers
Answer:
114
Step-by-step explanation:
You will need to multiply L x W and then add them all
Answer:
174
Step-by-step explanation:
Solve the equation. 25-3x=40 what does x equal?
Answers
Answer:
x=-5
Step-by-step explanation:
25 - 3x = 40
-3x + 25 =40
-3x +25--25=40-25
-3x=15
-3x÷-3=25÷-3
x=-5
There are 24 muffins in a bakery. Out of those, 3/8 are blueberry muffins. How many muffins are blueberry muffins?
Answers
Answer:
9 blueberry muffins
Step-by-step explanation:
24*3/8 = 9
PLEASE HELP TODAY ASAP WILL GIVE BRAINLIEST TO FIRST CORRECT ANSWER.
What is the value of x?
Enter your answer in the box.
x =
Answers
Answer:
x = 5
Step-by-step explanation:
The interior angles of a triangle always have to add up to 180 degrees.
This means you can form an equation with the three angles you have:
(10x - 4) + (8x + 3) + 91 = 180
Then, solve:
[tex]10x-4+8x+3+91=180[/tex]
combine like terms
[tex]18x+90=180[/tex]
subtract 90 from both sides
[tex]18x = 90[/tex]
divide both sides by 18
[tex]x = 5[/tex]
Answer:
sxdcfghnujgyhuj
Step-by-step explanation:
Write an expression, using an exponent, that is equivalent to 6x6x6x6x6
Answers
Answer:
6^5 or 6 to the power of 5
Step-by-step explanation:
This is because 6*6 is 36 which is equal to 6^2 and 6*6*6 is 6^3 6*6*6*6 is 6^4 and finally we have 6*6*6*6*6 which is 6^5.
whats the area of the triangle 17in and 12 in?
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Answer:
Area of the triangle =(height x base ) /2
A=(17x12)/2
A=102
the area of the triangle is 102
the cost of 12 pencils is rupees 37 4 by 5 find the cost of one pencil
Answers
Answer:
Cost of 12 pencils = 37 4/5 = 189/5
Cost of 1 pencil = 189/5 ÷ 12
= 189/5 x 1/12 = 189/60 = 63/20 = 3 3/20
So required answer is 3 3/20
Hope This Helps You!
Hank, the owner of Hank's Hot Dog Hut, deposited $175 this morning from his late-night sales. This afternoon, he deposited another $280 from lunch sales.
What was the total change in Hank's bank account relative to where it started?
Answers
Answer:
I believe the answer is $455
Answer:
the answer from IXL is $455
Step-by-step explanation:
5
4
3
5x - y = 9
2
2x + 6y = 13
1
1
ty
-2.
Х
0
2.
3
4
5
-1
2
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Answer:
5x - y =1 13htut yti rindu err err h is
which expressions are equivalent
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a triangle has sides with lengths 10 inches, 14 inches, and 17 inches. is it a right triangle
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PLEASE HELP DUE IN 5 MINS
Answers
5^3 - 5 x 2
plz help i am in six grade
Answers
Answer:
115 Is the Answer I hope this helps
Step-by-step explanation:
How do you write 24/32 in simplest form?
Answers
Answer:
3/4
Step-by-step explanation:
To find 24/32 in its simplest form, you need to find the biggest common factor.
24: 1, 2, 3, 4, 6, 8, 12, 24
32: 1, 2, 4, 8, 16, 32
For these two numbers, it's 8. Divided 24 and 32 by 8.
3/4
Answer:
1 1/23
Step-by-step explanation:
how would i solve 6^3x+4 = 6^5x-2?
Answers
Answer:
Step-by-step explanation: it’s kinda hard to explain but the solution is
6x+36 :)
A photographer is 6 feet tall and casts a shadow that is 2 feet long. He is photographing a palm tree with a shadow that is 7 feet long. What is the height of the tree?
Answers
Answer:
Step-by-step explanation:
84