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
Sedbober [7]
2 years ago
10

The ancient Egyptians build their pyramids using a ramp to move the heavy blocks up. The length of the ramp was 25m and the heig

ht was 10m the weight of the block was 250kg and the effort weight is 180kg. What is the efficiency of the inclined plane
Physics
1 answer:
hammer [34]2 years ago
5 0

Answer:

Efficiency of the inclined plane is 56%

Explanation:

efficiency = (work output / work input) x 100%

efficiency = ([load force x load distance] x [effort force x effort distance]) x 100%

efficiency = (250 kg x 10 m) / (180 kg x 25 m) x 100%

efficiency = (2500kg/m) / (4500kg/m) x 100%

efficiency = 0.555 = 0.56 x 100%

efficiency = 56%

You might be interested in
Light waves travel most slowly through a ____<br><br> A) gas<br> B) solid<br> C) liquid
WITCHER [35]

Answer:

Liquid

Explanation: It can't be gas because gases are all around us and we can still see light. For solids it can't even move through a solid. Ex: If you're in a solid dome made of rock you can't get any light through. Let me know if I'm right!

3 0
3 years ago
Read 2 more answers
What is the input of energy for a device that provides 50 units of useful energy and has an efficiency of 0.55?
ki77a [65]

If that's the case, then  

                          50 units = 0.55 x the input energy

Divide each side by  0.55 :        

                   50 units/0.55  =  the input energy = 

                              <span> 90 and 10/11 units</span>
3 0
2 years ago
If there is a current of 15A in a circuit for 5 minutes, what quantity of electric charge flow through the circuit?
poizon [28]

charge = current * time

q = 15 * 300    [5 min = 300 sec ]

q = 4500 C

7 0
3 years ago
A mass weighing 4 lb stretches a spring 2 in. Suppose that the mass is given an additional 6-in displacement in the positive dir
givi [52]

Answer:

\frac{1}{8} y'' + 2y' + 24y=0

Explanation:

The standard form of the 2nd order differential equation governing the motion of mass-spring system is given by

my'' + \zeta y' + ky=0

Where m is the mass, ζ is the damping constant, and k is the spring constant.

The spring constant k can be found by

w - kL=0

mg - kL=0

4 - k\frac{1}{6}=0

k = 4\times 6 =24

The damping constant can be found by

F = -\zeta y'

6 = 3\zeta

\zeta = \frac{6}{3} = 2

Finally, the mass m can be found by

w = 4

mg=4

m = \frac{4}{g}

Where g is approximately 32 ft/s²

m = \frac{4}{32} = \frac{1}{8}

Therefore, the required differential equation is

my'' + \zeta y' + ky=0

\frac{1}{8} y'' + 2y' + 24y=0

The initial position is

y(0) = \frac{1}{2}

The initial velocity is

y'(0) = 0

6 0
3 years ago
a horizontal force of 50N acts on a body of mass 20KG initially at rest and displaces it by striking it along the entire 20m pat
Aneli [31]

Answer:

1000 J

Explanation:

Work = force × distance

W = (50 N) (20 m)

W = 1000 J

3 0
3 years ago
Other questions:
  • What are the cons of using a cup made of ceramic
    15·2 answers
  • Which of the following activities is most likely to result in nutrient pollution? a. cutting down trees b. pouring motor oil dow
    15·2 answers
  • Two charged objects of +2Q and +1Q are placed a distance d from one another. The force between the objects in measured as 2F. If
    15·1 answer
  • A runner starts from a rest and speeds up with a constant acceleration . if she has gone a distance of 30 m at the point when sh
    15·2 answers
  • A middle-aged man typically has poorer hearing than a middle-aged woman. In one case a woman can just begin to hear a musical to
    7·1 answer
  • What is the force of gravity between a 500kg bal and a 100,000kg basket 5m apart?
    7·2 answers
  • One of the predicted problems due to global warming is that ice in the polar ice caps will melt and raise sea level everywhere i
    13·1 answer
  • A refrigerator draws 4.5 A of current while operating on a 120-V power line. If the refrigerator runs 50% of the time and electr
    5·1 answer
  • If an object is placed at distance of 16cm from a plane mirror, How far would it be from it's image?​
    14·1 answer
  • Which of the following statements is true?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!