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
Alex73 [517]
3 years ago
13

A frightened child is restrained by her mother as the child slides down a frictionless playground slide. If the force on the chi

ld from the mother is 116 N up the slide, the child's kinetic energy increases by 30 J as she moves down the slide a distance of 1.9 m.
(A) How much work is done on the child by the gravitational force during the 1.9 m descent?
(B) If the child is not restrained by her mother, how much will the child's kinetic energy increase as she comes down the slide that same distance of 1.9 m?
Mathematics
1 answer:
MissTica3 years ago
6 0

Answer:

Step-by-step explanation:

Given

Restrained Force F=116 N

Increase in Kinetic Energy \Delta K.E.=30 J

Distance moved d=1.9 m

Work done by all the forces is equal to change in Kinetic Energy of Object i.e. by gravity force, Normal force and Applied Force

\Delta K.E.=W_g+W_f+W_N

30=W_g-F\cdot d

30=W_g-116\cdot 1.9

W_g=250.4 J

(b)In absence of applied force thus

work done by gravity will be equal to  change in kinetic Energy

change in Kinetic Energy=210 J

You might be interested in
Find the value of x.
svetoff [14.1K]

Answer:

68

Step-by-step explanation:

1) Find the interior angle using relations of angles in straight line I.e ( sum of angles in a straight line is 180 ) and we know the sum of all the interior angle of quadrilateral is 360 degree .

2) Solve further for x.

5 0
3 years ago
Sophia bought snacks for her team's practite. She bought a bag of chips for $1.84 and
Sergeeva-Olga [200]
$8.10 hope this is right
7 0
3 years ago
Read 2 more answers
I don’t understand this
Oxana [17]

You have to multiply whats outside the parenthesis with everything that is inside, so

x^{-3}y^0.(x^2-3x^5y^4)

x^{-3}y^0.x^2-x^{-3}y^0.3x^5y^4

Multiplication of same bases we sum the exponents

x^{-3+2}y^0-3x^{-3+5}y^{0+4}

x^{-1}.1-3x^2y^4

x^{-1}-3x^2y^4

Alternative B.

7 0
3 years ago
Which value of x is the solution of the equation 2(x – 4) + 7 = 3? (a) 1 (b) 6 (c) 2 (d) 0
pav-90 [236]

Answer:

(c) 2

Step-by-step explanation:

2(x - 4) + 7 = 3

2x + 2(-4) + 7 = 3

2x - 8 + 7 = 3

2x - 1 = 3

2x - 1 + 1 = 3 + 1

2x = 4

2x/2 = 4/2

x = 2

Hope this helps!!!

4 0
3 years ago
if two angles are complementary then the sum of their measure is 90. if the sum of the measures of two angles is 90 then both of
Tju [1.3M]
Yes, both angles are acute because all complementary angles are acute.
6 0
2 years ago
Other questions:
  • Thirty-eight and ninety-seven hundredths kilograms in standard form
    14·2 answers
  • Whats the answer ? evaluate 7^3 - 25
    15·2 answers
  • ghexdhdxdhhFRE.E BRAINLIESThgdvbdnsjebdshwydsbshssbegdvdbghexdhdxdhhFRE.E BRAINLIESThgdvbdnsjebdshwydsbshssbegdvdbghexdhdxdhhFRE
    15·1 answer
  • 9.476, 9.427, 9.43, 9.347, 9.4, 9.38 <br><br><br> LESS OR GREATER <br><br><br> ASAP PLS
    10·1 answer
  • I BET NO ONE KNOWS THIS A rare cooking spice with no close substitutes is an example of a product that is:
    7·1 answer
  • in a triangle PQR, p=7.5cm, q=10cm, r=9.1cm. find the largest angle in the triangle using cosine rule.​
    12·1 answer
  • So tell me how many assignments are you missing?
    8·2 answers
  • In ΔCDE, the measure of ∠E=90°, the measure of ∠D=50°, and DE = 8. 1 feet. Find the length of CD to the nearest tenth of a foot
    6·1 answer
  • LEVEL 3! HELP PLEASE!
    15·1 answer
  • What is the equation of the following line? Be sure to scroll down first to see
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!