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
Charra [1.4K]
3 years ago
14

In a simple machine, what does it mean :i) If efficiency is said to be 65%.

Physics
2 answers:
Umnica [9.8K]3 years ago
8 0
It is an real machine because if efficiency is below100% it is real machine but if efficiency is 100% it is an ideal machine
hichkok12 [17]3 years ago
7 0
This machine is has an efficiency of 65% which means the machines is ok not that efficient
You might be interested in
Given that the atomic weight of hydrogen is approximately 1 gram per mole, use the method above to estimate the average molecula
denpristay [2]

Answer:

2

Explanation:

6 0
3 years ago
Does air resistance affect the motion of a falling object differently when the initial velocity of the object is greater?
DIA [1.3K]
Yes. Even greater. Air resistance or drag becomes harder the faster an object goes. This is why when cars reach their max speed they don't accelerate as fast, because they are pushing harder against the wind. If I take a tennis ball and shoot it down a bottomless pit, a 400 kph, the drag will slow the ball down till it reaches terminal velocity. 
4 0
3 years ago
Read 2 more answers
Calculate the force at sea level that a boy of mass 50 kg exerts on a chair in which he is sitting.
kogti [31]

As per the question the mass of the boy is 50 kg.

The boy sits on a chair.

We are asked to calculate the force exerted by the boy on the chair at sea level.

The force exerted by boy on the chair while sitting on it is nothing else except the force of gravity of earth i.e the weight of the body .The direction of that force is vertically downward.

At sea level the acceleration due to gravity g = 9.8 m/s^2

Hence the weight of the boy w = mg  [m is the mass of the body]

we have m = 50 kg.

                             Hence w = 50 kg ×9.8 m/s^2

                                             =490 N kg m/s^2

                                              = 490 N

Here newton [N] is the unit of force.





6 0
3 years ago
Read 2 more answers
6. A 4 kg object hangs below a 6 kg object by a string of negligible mass. If the 6 kg object is pulled upward by a force of 440
MrRissso [65]

Answer:

T =176 N

Explanation:

from diagram

F -(m_1+m_2_g) = (m_1+m_2_g)a

440 - (6+4)g = (6+4)a

a =\frac{440-10*9.8}{10}

a =34.2 m/s^2

frrom free body diagram of mass m2 = 4kg

T -m_2g =m_2a

T = m_2(g +a)

T = 4(9.81+34.2)

T =176 N

7 0
3 years ago
Galileo is heliocentric or geocentric
algol [13]
Galileo is geocentric, just like all the rest of us.
6 0
3 years ago
Read 2 more answers
Other questions:
  • Difference between relaxation time and collision time?
    7·2 answers
  • Which statement about moons is true?
    5·1 answer
  • Tory has a mass of 40kg. She sleds down a hill that has a slope of 25 degrees. what is the component of her weight that is along
    9·1 answer
  • A short term affect of anorexia might include wight loss
    7·1 answer
  • What simple machine makes up most of the joints in your body
    10·1 answer
  • An input for of 80 N is used to lift an object weighing 240 N with a system of pulleys. How far must the rope around the pulleys
    11·1 answer
  • HELP PLZ QUICK HELP PLZ QUICK HELP PLZ QUICK HELP PLZ QUICK
    7·2 answers
  • How far is the region from the equator or helps control climate
    7·1 answer
  • A car accelerates from rest at 2 m/s. what is the speed after 8 sec?
    14·1 answer
  • Which materials are most thick ? Please help
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!