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
algol [13]
3 years ago
14

A 1200-N crate rests on the floor. How much work is required to move it at constant speed (a) 5.0 m along the floor against a fr

iction force of 230 N, and (b) 5.0 m vertically?
Physics
1 answer:
Bogdan [553]3 years ago
6 0

Answer:

(a) The work required to move the crate = 7150 J

(b) The Work required to move the crate vertically = 6000 J

Explanation:

(a) Frictional Force: These is the force that tend to oppose the motion of  two bodies in contact.

Work required to move the crate = work done against friction + work required to move it through a distance of 5.0 m.

Wr = Wf + Wd

Where Wr = work required to move the crate, Wf = work done against friction, Wd = work required to move the crate through 5.0 m

Given: Wf = friction force × distance = 230×5 = 1150 J

and Wd = force × distance = 1200×5.0 =6000 J.

Substituting these values into equation 1

Wr = 6000 + 1150

Wr = 7150 J

Therefore the work required to move the crate = 7150 J

(b)

Work required to move the crate vertically = mgh

or

Work required to move the crate vertically =  Wh................ Equation 2

Where W = weight of the block, h = vertical height

<em>Given:W = 1200 N, h= 5.0 m</em>

Substituting these values into equation 2

Work required to move the crate vertically = 1200×5

Work required to move the crate vertically = 6000 J

You might be interested in
Briefly explain how a resonance tube works​
Lera25 [3.4K]

Answer:

As the tines of the tuning fork vibrate at their own natural frequency, they created sound waves that impinge upon the opening of the resonance tube. These impinging sound waves produced by the tuning fork force air inside of the resonance tube to vibrate at the same frequency.

4 0
2 years ago
Read 2 more answers
When an ideal diatomic gas is heated at constant
ira [324]

Answer:

Q=∆U+W

Explanation:

work done+ change in internal energy = heat supplied to change the internal energy

(1st law of thermodynamics)

7 0
2 years ago
What happens when Molecules collide?
Deffense [45]

Answer:

Collision theory is used to predict the rates of chemical reactions, particularly for gases. It is based on the assumption that for a reaction to occur for the reacting species (atoms or molecules) must come together or collide with one another. Not all collisions, however, bring about chemical change.

If two molecules collide with sufficient activation energy, there is no guarantee that the collision will be successful. In fact, the collision theory says that not every collision is successful, even if molecules are moving with enough energy. The reason for this is because molecules also need to collide with the right orientation so that the proper atoms line up with one another, and bonds can break and re-form necessarily.

4 0
2 years ago
what is the net force of a 6 kg object that goes from a velocity of 0.5 m/s to a velocity of 3 m/s over the course of 1.5 second
baherus [9]

Answer:

∑F = 10.2 N

Explanation:

We have:

Initial velocity: 0.5 m/s

Final velocity: 3 m/s

Time: 1.5 s

We have all of the components needed to calculate acceleration. Let's do that, shall we?

a = vf-vo/t

a = 2.5/1.5

a = 1.7 m/s^{2}

Now, look at the Net Force equation:

∑F = ma

Plug in the variables, to get:

∑F = (6)(1.7)

∑F = 10.2 N (You can round this according to significant digits)

3 0
3 years ago
As an aid in working this problem, consult Concept Simulation 11.1. The volume flow rate in an artery supplying the brain is 3.5
klemol [59]

Answer

given,

flow from the artery = 3.5 x 10⁻⁶ m³/s

Radius of artery = 5.80 x 10⁻³m

area = π R²

       = π x (5.8 x 10⁻³)²

       = 1.06 x 10⁻⁴ m²

v = \dfrac{Q}{A}

v = \dfrac{3.5 \times 10^{-6}}{1.06 \times 10^{-4}}

v = 0.033 m/s

b) new velocity of flow

Radius = R' = R/4

 A V = A' V'

 R² V = R'² V'

 R^2 V = (\dfrac{R}{4})^2 V'

 V' = 16 V

 V' = 16 x 0.033

  V' =0.528 m/s

5 0
2 years ago
Other questions:
  • A metal ball of mass 100 g is heated to 90°C and then cooled to 25°C. The heat lost in the process is 2.5 kJ. Another metal ball
    15·2 answers
  • A clam of mass 0.12 kg dropped by a seagull takes 3.0 s to hit the ground. [Neglect friction.]
    11·1 answer
  • A solid yellow line on your side of the center stripe means pass with care.<br> A. True<br> B. False
    7·1 answer
  • WILL NAME THE BRAINLIEST! An airplane undergoes the following displacements: It first flies 72 km in a direction of 30° East of
    8·1 answer
  • The area of the maxila where the teeth attach is called the ??
    8·1 answer
  • Suppose there is a sample of xenon in a rectangular container. The gas exerts a total force of 4.47 N perpendicular to one of th
    8·1 answer
  • ITS EASY TRUST ME!!!!
    5·2 answers
  • Can someone please help me with science.
    7·1 answer
  • The relationship that exists between gravity and distance and mass respectively.
    5·1 answer
  • A student walks 12 blocks to a coffee shop. (Assume all the blocks are equal length.) How long will it take him to reach the cof
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!