An 8 kg box is at rest and is pushed for 10 m with a 60 N force. If it's accelerated to 10 m/s, calculate the efficiency of the force.

Answers

Answer 1

Answer:

  2/3

Step-by-step explanation:

The work done on the box is ...

  Fd = (60 N)(10 m) = 600 N·m = 600 J

The amount of energy the box has as a result is ...

  KE = 1/2mv² = (1/2)(8 kg)(10 m/s)² = 400 kg·m²/s² = 400 J

The ratio of box energy to energy input is ...

  η = (400 J)/(600 J) = 2/3 . . . ≈ 66.7%


Related Questions

Gabriel is signing up for a gym membership with a one time free join and then a monthly fee to remain a member. The monthly fee is $40 and the one time joining fee is $100. Write an equation for C, in terms of t, representing the total cost of the gym membership over t months

Answers

40t + 100 = C. this means that the there’s 40 being paid every month, and 100 is the constant

it’s either ur good at math or pretty I guess god said be pretty

Answers

Answer:

55

Step-by-step explanation:

9x + 1 = 7x + 13

x = 6

UW = 42+13

= 55

The two triangles are of congruent (SAS)

Solve for x. Round all answers to the nearest tenth

Answers

Answer: 42

Step-by-step explanation:

please help it's due today its all up to you guys

Answers

Answer:

is the 3rd one

Step-by-step explanation:

Answer:

36 units ^2 that means c is the answer

Step-by-step explanation:

please please please help!!!!!! i will give brainliest!!

Answers

Answer:

Step-by-step explanation:

The student newspaper runs a weekly question that readers can answer online or by campus mail. One question was "Do you think the
college is doing enough to provide student parking?" of the 136 people who responded, 79% said "No". The number 79% is a
A. parameter
B.population
C.sample
D.statistic

Answers

Answer:

Statistic

Step-by-step explanation:

Just a hunch but whenever there's percentages involved, it's usually statistics

Help fast plz 100 points!

Answers

Answer:

[tex] \huge \boxed{ \boxed {\sf \: a)49 {x}^{2} + 14x + 1}}[/tex]

Step-by-step explanation:

to understand thisyou need to know about:composition of functionPEMDAStips and formulas:[tex](g \circ f)x \iff g(f(x))[/tex]let's solve:[tex] \sf sustitute \: the \: value \: of \: f(x) \: to \: g(x) : \\ \sf (7x + 1 {)}^{2} [/tex][tex] \sf use \: (a + b {)}^{2} = {a}^{2} + 2ab + {b}^{2} \: to \: simplify : \\ (7x {)}^{2} + 2.7x.1 + ( {1)}^{2} [/tex][tex] \sf simplify : \\ 49 {x}^{2} + 14x + 1[/tex]

___________________________________

[tex]\huge\underline{\tt{\red{Problem:}}}[/tex]

Given [tex] \tt{f(x) = 7x + 1}[/tex]and [tex] \tt{g(x) = {x}^{2} }[/tex]find, [tex] \tt{( \: g \: \: • \ \: f \: )(x)}[/tex].

[tex]\huge\underline{\tt{\red{Formula:}}}[/tex]

[tex] \tt{( \: g \: \: • \ \: f \: )(x)}[/tex].

[tex]\huge\underline{\tt{\red{Solution:}}}[/tex]

[tex]\quad\quad\quad\quad \tt{ ({x}^{2} )(7x + 1)}[/tex]

[tex]\quad\quad\quad\quad \tt{ ({x}^{2} )(7x) = 7{x}^{3} }[/tex]

[tex]\quad\quad\quad\quad \tt{ ({x}^{2} )( 1) = {x}^{2} }[/tex]

Let's add it.

[tex]\quad\quad\quad\quad \boxed{\tt{ {7x}^{3} + {x}^{2} }}[/tex]

[tex]\huge\underline{\tt{\red{Answer:}}}[/tex]

[tex]\huge \quad\quad \underline{\red{ \boxed{\tt{{7x}^{3} + {x}^{2} }}}}[/tex]

___________________________________

#CarryOnLearning

✍︎ C.Rose❀

What is the area of this trapezoid b1=6 h=5 b2=2

Answers

A = h × (b1 + b2 / 2)

A = 4 × ( 10 + 5 / 2)

A = 4 × (15/2)

A = 30 in²

Is 1/4 greater than or less than 3/9

Answers

Answer: Less

Step-by-step explanation: Ok lets make them both have a common denominator. This is 36. So 1/4 is going to be 9/36 and 3/9 is going to be 12/36

Answer:

1/4 is less than 3/9.

Step-by-step explanation:

Take these fractions into decimal format.

1/4 = 0.25

3/9 = 0.33.

From this, 0.25 < 0.33

So, 1/4 < 3/9, or 1/4 is less than 3/9.

Please help me ! !!!

Answers

3 that’s the answer your welcome

Find the measure of an exterior angle of a regular polygon with 19 sides. Round to the nearest tenth if necessary.



Question 10 options:

Yes; Opposite sides are parallel.

Yes; Diagonals bisect each other.

Yes; Diagonals are congruent.

No; Diagonals are not congruent.

Answers

Answer:

Each exterior angle measures 360/19 degrees, approximately 18.9 degrees.

Step-by-step explanation:

Start at one vertex of the polygon and go clockwise.  When you reach the next vertex, you change direction.  At each vertex you change direction by the same angle.  When you are back to the first vertex, and start along the first side, you have completed a full 360 degrees clockwise.  Since there are 19 sides and vertices, you must have turned 360/19 degrees at each vertex.

Help please and thank u!!!

Answers

1. C. The graphs of two equations are the same line

2. (-3, 2)

(+5)(-2)(+7)(-4)(-1)​

Answers

Answer:

-280

Step-by-step explanation:

Answer:

280

Step-by-step explanation:

For a convention at a luxury hotel, rooms cost $1600. per night when 90 rooms are rented. For every extra room over 90, the price is reduced by $10 per room. How manly extra rooms should the hotel rent to maximize the revenue for the hotel? A) 20 B) 25 C) 30 D) 35

Answers

Answer:

jhnouhnn

Step-by-step explanation:

Please help me with the answer ASAP

Answers

Answer:

105/5 i believe

Step-by-step explanation:

simplifying 14 to the 0 power + 2 to the 7th power plus 15 to the 1 power?​

Answers

Answer:

144

Step-by-step explanation:

1+128+15

144

Its 144 here’s the work if you need it <33

Mrs. A has 76 wonderful seventh graders that she teaches this year. She took a random survey of 20 students and
found that seven students like twizzlers, 12 like jolly ranchers, and one does not eat sweets. pls help meh

Answers

Answer:

what kind of a question is this? lol. seems liek u need to subtract those 20 students from 70. im not sure wat ur askin but here. try this.

WHAT IS THE QUESTION??? im confused. welp.

What is it help me plz

Answers

Answer:

the answer is c. the mode is w

Find the circumference of the circle. Use 3.14 for PI .

Circle Is 18 feet

Answers

Answer: pie

Step-by-step explanation: mcdonald.

yeet is good and feet is also good

49 is 160% of what number?

Answers

Answer:

x = 30.63

Step-by-step explanation:

Answer:

30.63

Step-by-step explanation:

We have, 160% × x = 49

or, 160/100 × x = 49

Multiplying both sides by 100 and dividing both sides by 160,

we have x = 49 ×

100/160 x = 30.63

If you are using a calculator, simply enter 49×100÷160, which will give you the answer.

h - 9 > 13 please help

Answers

Answer:

h>22

Step-by-step explanation:

I got 18 can someone double check me please?

Answers

Answer:

It's correct, it is 18 because ur adding

Answer:

28!

Step-by-step explanation:

this is because its  8 + 8 + 6 + 6 = 28. They're asking to add the outline of the perimeter.The perimeter is the length of the outline of a shape.

if 2x-1 is a factor of 16x^4-24x^3+2x+f find f

Answers

Answer: HERE HOPE IT HELPS

Step-by-step explanation:

The model shows the addition expression 18 + 12.
One expression that is equivalent to this sum is _____.
A. 3 + 6 + 4
B. 3 (6 + 4)
C. (3 + 6) 4
D. 3 (6) + 4

Answers

B. 3 (6+4)
i hope this helps!

need help on assignment​

Answers

Answer:

? = [tex]tan^{-1}[/tex](11/24)

**PUT  [tex]tan^{-1}[/tex](11/24) INTO CALCULATOR

Step-by-step explanation:

1. tan(?)=11/24

--> 11/24: SOH, CAH, TOA: sin(x)=opposite side of the x/hypotenuse, cos=adjacent side of the x/hypotenuse, tan=opposite side of the x/adjacent side

2. to get ? of tan you can't divide tangent, you have to do the inverse function, which is [tex]tan^{-1}[/tex], and put it into the calculator

which of the following is true about f(x) and g(x)

Answers

The option (D) "f(x) and g(x) are closed under the addition because when added, the result will be a polynomial is correct.

What is polynomial?

Polynomial is the combination of variables and constants systematically with "n" number of power in ascending or descending order.

[tex]\rm a_1x+a_2x^2+a_3x^3+a_4x^4..........a_nx^n[/tex]

We have given two polynomials:

[tex]\rm f(x) = \rm a_0+a_1x+a_2x^2+a_3x^3+a_4x^4..........a_nx^n[/tex]

[tex]\rm g(x) = \rm b_0+b_1x+b_2x^2+b_3x^3+b_4x^4..........b_mx^m[/tex]

If we add the above two polynomials:

= f(x) + g(x)

[tex]= (\rm a_0+a_1x+a_2x^2+a_3x^3+a_4x^4..........a_nx^n) + (\rm \rm b_0+b_1x+b_2x^2+b_3x^3+b_4x^4..........b_mx^m)[/tex]

The above expression is also a polynomial.

Thus, the option (D) "f(x) and g(x) are closed under the addition because when added, the result will be a polynomial is correct.

Learn more about Polynomial here:

brainly.com/question/17822016

#SPJ1

simplify 3c÷c²-d²-3d÷d²-c²

Answers

-0 good luck queen hdhdhdjf

Can someone help and explain

Answers

Answer: 64 [tex]cm^{2}[/tex]

Step-by-step explanation:

First, you need to find the area of the parallelogram (bh)

10 * 7 = 70

since you only need the shaded region, find the area of the non shaded box and subtract that from the area.

3 * 2 = 6

70 (whole area) - 6 (nonshaded area) = 64

Please give me brainliest if I’m correct!

We can see that the figure is parallelogram. So,
Area of shaded region=area of parallelogram-area of rectangle(inside parallelogram).
Area of shaded region= b x h - l x b
Area of shaded region = 10 x 7 - 3 x 2
Area of shaded region = 70-6
Area of shaded region = 64 square cm..

Here is your answer. Hope it helps you..

20 The table shows the linear relationship between the balance of a student's
savings account and the number of weeks he has been saving.
Savings Account
Week
0
1
3
6
8
13
Balance
(dollars)
32
39
53
74
88
123
Based on the table, what was the rate of change of the balance of the
student's savings account in dollars and cents per week?
Record your answer and fill in the bubbles on your answer document.

Answers

Answer:7

Step-by-step explanation:it’s 7

Twice as many people visit the park when it is sunny compared to when it is cloudy. One day it was half sunny and half cloudy and 48 people visited the park. How many people visit the park on a sunny full day?

Answers

Answer:

64

Step-by-step explanation:

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