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
Anestetic [448]
3 years ago
12

If a 340 N girl sits on a seesaw and is lifted 1.4 m in 1.6 s, how much work was done by the child on the other side?

Physics
1 answer:
blondinia [14]3 years ago
4 0
In physics, work is defined as the total energy when an object is moved to a certain displacement by the application of external force. It is calculated by the expression W = Fd. For this case, the displacement is apparently zero, then there is no work in the system above.
You might be interested in
What is inelastic deformation?
EleoNora [17]
The answer is A. Deformation is where the object doesnt return to its original shape.
7 0
2 years ago
A 12.0-g bullet is fired horizontally into a 109-g wooden block that is initially at rest on a frictionless horizontal surface a
kykrilka [37]

Answer:

v₀ = 280.6 m / s

Explanation:

we have the shock between the bullet and the block that we can work with at the moment and another part where the assembly (bullet + block) compresses a spring, which we can work with mechanical energy,

We write the mechanical energy when the shock has passed the bodies

   Em₀ = K = ½ (m + M) v²

We write the mechanical energy when the spring is in maximum compression

Em_{f} = K_{e} \\= \frac{1}{2} kx^2\\    Em_0 = Em_{f}

½ (m + M) v² = ½ k x²

Let's calculate the system speed

   v = √ [k x² / (m + M)]

   v = √[152 ×0.78² / (0.012 +0.109) ]

   v = 27.65 m / s

This is the speed of the bullet + Block system

Now let's use the moment to solve the shock

Before the crash

   p₀ = m v₀

After the crash

p_{f} = (m + M) v

The system is formed by the bullet and block assembly, so the forces during the crash are internal and the moment is preserved

 p_0 =  p_{f}

  m v₀ = (m + M) v

  v₀ = v (m + M) / m

let's calculate

v₀ = 27.83 (0.012 +0.109) /0.012

  v₀ = 280.6 m / s

4 0
3 years ago
Which of these statements is true?
9966 [12]
C.) Meiosis involves two cycles of cell division

Hope this helps!
6 0
3 years ago
Read 2 more answers
A generator converts mechanical energy into _____________________ energy.
erica [24]
Electrical energy is your answer.
6 0
3 years ago
Read 2 more answers
A force of 1 N will cause a mass of 1 kg to have an acceleration of 1 m/s2. Therefore, a force of 7 N applied to a mass of 7 kg
Lana71 [14]

1 m/s^2

Using F=ma,

7=7a

a=1

3 0
3 years ago
Read 2 more answers
Other questions:
  • QUICK! If i have a 95.6% in my as my grade in that class what is 30% off of that grade?
    11·1 answer
  • Atmospheric pressure changes ____.
    15·2 answers
  • Grinding quartz crystals down to produce sand is an example of a a. change of state. c. chemical reaction. b. chemical change. d
    7·1 answer
  • 1. Which of the following is the broadest, most inclusive taxonomic group? genus species family domain 2. The species name of th
    9·1 answer
  • Whích best explains parallel forces?
    9·1 answer
  • When liquid silver nitrate and liquid sodium chloride are combined, solid silver chloride forms along with a new liquid, sodium
    8·1 answer
  • 02<br>The ano ture of a converges<br>து<br>The serie<br>atooaod<br>பி<br>5​
    6·1 answer
  • Aranza is 17 years old. What is her Target Heart Rate at 70%? I will give brainliest ​
    7·1 answer
  • WILL GIVE THAT CROWN THINGY!
    13·2 answers
  • I really need some with help with this anyone who can help with acceleration and velocity pleasee and thank you
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!